CalcBright Calculators
REMOTE · CALCBRIGHT.COM
160+ calculators: take-home pay for 166 countries, mortgage, loan, VAT, BMI, dates, units, currency.
Available components
Last scanned (16 hours ago)
Scores higher than 46% of remote servers
Reachable. Last reached 18 Oct 2026.
Category Finance and Payments
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 4 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability63
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 22822 tokens (~136/item across 167 items; 167 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management20
- Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety75
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- 0 of 4 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "land_transfer_tax_calculator" implies "transfer" and declares readOnlyHint instead, contradicting what its own name says it does. See how to fix → Fail
- An AI judge read all 168 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 17 Oct 26 +1
- “body_surface_area_calculator” added an optional parameter “heightIn” cosmetic
- “body_surface_area_calculator” added an optional parameter “weightLb” cosmetic
- “take_home_pay_calculator” added an optional parameter “bahrain” cosmetic
- “401k_calculator” dropped the optional parameter “currency” cosmetic
4 cosmetic changes on this day. Switch on “Show cosmetic changes” to see them.
- 16 Oct 26 0
- The server rewrote its instructions, which are the text every model session reads security
- New tool “body_surface_area_calculator” functional
- New tool “interest_only_mortgage_calculator” functional
- New tool “permutation_combination_calculator” functional
- New tool “unit_price_calculator” functional
- New tool “weighted_average_calculator” functional
- 15 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 13 Oct 26 +1
- Stability: unverified → 0.03 ▲ functional
- 12 Oct 26 61
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 18 Oct 2026 · Probed https://calcbright.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=calcbright.com | CN=WE1,O=Google Trust Services,C=US | 10 Oct 2026 | 8 Jan 2027 | ECDSA 256 | ECDSA-SHA256 | fd64dec770757eda0e3f86c99850958b |
| SANs: calcbright.com | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of calcbright.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| calcbright.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000; includeSubDomains |
| x-content-type-options | nosniff |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://calcbright.com/mcp | Verified | 200 | |
| http (plaintext) | http://calcbright.com/mcp | HTTPS enforced | 301 | https://calcbright.com/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
percentage_change_calculator Percentage Change Calculator ~113
80 to 100 is a 25% increase but only a 22.22% difference. Get percent change, the percentage difference, or reverse a % change back to the original value. Web page: https://calcbright.com/percentage-change-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| a | number | – | Old (starting) value |
| b | number | – | New (final) value |
| dir | string | – | Direction |
| mode | string | – | Calculate |
| pct | number | – | Percentage (%) |
No output schema declared.
No examples provided.
period_calculator Period Calculator ~111
Predict your next six periods from the date your last one started and your cycle length, with ovulation days and fertile windows on the same calendar. Web page: https://calcbright.com/period-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| cycle | number | – | Average cycle length (days) From the first day of one period to the first day of the next – 28 on average. |
| date | string | – | First day of your last period (YYYY-MM-DD) |
| length | number | – | Period length (days) |
No output schema declared.
No examples provided.
permutation_combination_calculator Permutation & Combination ~87
Choosing 3 from 10 items gives 720 ordered arrangements (nPr) or 120 combinations (nCr). Get both, plus repetition cases and n factorial, with exact big numbers. Web page: https://calcbright.com/permutation-combination-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| n | number | – | Total items (n) |
| r | number | – | Items chosen (r) |
No output schema declared.
No examples provided.
pregnancy_due_date_calculator Pregnancy Due Date Calculator ~98
Your due date is 280 days from your last period, adjusted here for cycle length. Also works from a conception or IVF transfer date, with weeks pregnant today. Web page: https://calcbright.com/pregnancy-due-date-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| cycle | number | – | Average cycle length (days) |
| date | string | – | First day of last period (YYYY-MM-DD) |
| method | string | – | Calculate from |
No output schema declared.
No examples provided.
prime_number_checker Prime Number Checker ~88
Is 91 prime? No – it is 7 × 13. Test any whole number up to one trillion, see its smallest factor and prime factorization, and find the nearest primes. Web page: https://calcbright.com/prime-number-checker
| Name | Type | Req | Description |
|---|---|---|---|
| n | number | – | Whole number Any whole number from 0 to 1,000,000,000,000. |
No output schema declared.
No examples provided.
profit_margin_calculator Profit Margin Calculator ~100
$60 cost and a $100 price is a 40% profit margin but a 66.67% markup. Enter cost and revenue for gross profit, margin and markup, and prices for target margins. Web page: https://calcbright.com/profit-margin-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| cost | number | – | Cost What the item or sale cost you |
| currency | string | – | Currency |
| revenue | number | – | Revenue (selling price) |
No output schema declared.
No examples provided.
prorated_rent_calculator Prorated Rent Calculator ~106
Moving in on 11 March with $1,500 rent costs $1,016.13 for the first month. Enter the rent and your move date to get the exact partial-month charge. Web page: https://calcbright.com/prorated-rent-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| currency | string | – | Currency |
| date | string | – | Move date (YYYY-MM-DD) |
| mode | string | – | Calculate for |
| rent | number | – | Monthly rent |
No output schema declared.
No examples provided.
protein_calculator Protein Calculator ~103
How many grams of protein a day? From the 0.8 g/kg RDA to 2.2 g/kg for muscle gain, see your daily range for your body weight and activity or training goal. Web page: https://calcbright.com/protein-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| kg | number | – | Weight (kg) |
| lb | number | – | Weight (lb) |
| level | string | – | Activity / goal |
| units | string | – | Units |
No output schema declared.
No examples provided.
pythagorean_theorem_calculator Pythagorean Theorem Calc ~120
Legs of 3 and 4 give a hypotenuse of 5. Solve a² + b² = c² for any side of a right triangle, with exact radicals like 5√2, the angles, area and full working. Web page: https://calcbright.com/pythagorean-theorem-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| a | number | – | Leg a |
| b | number | – | Leg b |
| c | number | – | Hypotenuse c |
| solve | string | – | Solve for |
No output schema declared.
No examples provided.
quadratic_equation_solver Quadratic Equation Solver ~96
Solve ax² + bx + c = 0 with the quadratic formula: the discriminant, real or complex roots and the vertex of the parabola, with every step written out. Web page: https://calcbright.com/quadratic-equation-solver
| Name | Type | Req | Description |
|---|---|---|---|
| a | number | – | a (x² coefficient) |
| b | number | – | b (x coefficient) |
| c | number | – | c (constant) |
No output schema declared.
No examples provided.
ramadan_countdown_calculator Ramadan Countdown ~94
How many days until Ramadan, Eid al-Fitr and Eid al-Adha? Live countdown using the official Umm al-Qura calendar used in Saudi Arabia, UAE and the GCC. Web page: https://calcbright.com/ramadan-countdown-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| event | string | – | Count down to |
| from | string | – | From date Leave empty to count from today. (YYYY-MM-DD) |
No output schema declared.
No examples provided.
random_number_generator Random Number Generator ~118
Draw one number or up to 1,000 from any range – whole or decimal, with or without repeats. Useful for raffles, lottery picks, dice rolls and classroom draws. Web page: https://calcbright.com/random-number-generator
| Name | Type | Req | Description |
|---|---|---|---|
| count | number | – | How many numbers |
| decimals | number | – | Decimal places |
| kind | string | – | Type |
| max | number | – | Maximum |
| min | number | – | Minimum |
| sort | string | – | Order |
| unique | string | – | Allow duplicates? |
No output schema declared.
No examples provided.
ratio_calculator Ratio Calculator ~104
Solve A:B = C:D for the missing value or reduce a ratio to lowest terms – 1920:1080 becomes 16:9. Handy for recipes, screen sizes, map scales and mixes. Web page: https://calcbright.com/ratio-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| a | number | – | A |
| b | number | – | B |
| c | number | – | C |
| d | number | – | D |
| mode | string | – | Calculation |
No output schema declared.
No examples provided.
redundancy_pay_calculator Redundancy Pay Calculator ~133
UK statutory redundancy pay calculator for 2026/27: age bands, up to 20 years’ service and the new £751 weekly pay cap (£783 in Northern Ireland). Web page: https://calcbright.com/redundancy-pay-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| age | number | – | Age at redundancy (years) |
| pay | number | – | Weekly pay (before tax) Average gross weekly pay over the last 12 weeks. |
| region | string | – | Where do you work? |
| years | number | – | Full years of service (years) Only complete years count; the last 20 are used. |
No output schema declared.
No examples provided.
refinance_calculator Refinance Calculator ~133
Will a lower rate pay off? This refinance calculator compares your current and new mortgage payments, finds the break-even month and the lifetime interest. Web page: https://calcbright.com/refinance-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| balance | number | – | Current loan balance |
| closing | number | – | Closing costs Paid upfront (not rolled into the loan). |
| currency | string | – | Currency |
| newRate | number | – | New interest rate (%) |
| newTerm | number | – | New loan term (years) |
| rate | number | – | Current interest rate (%) |
| remaining | number | – | Years remaining (years) |
No output schema declared.
No examples provided.
rent_affordability_calculator Rent Affordability ~111
A $60,000 salary supports about $1,500 rent. This rent affordability calculator applies the 30% rule, the landlord 40x test and your monthly debts. Web page: https://calcbright.com/rent-affordability-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| currency | string | – | Currency |
| debts | number | – | Monthly debt payments Car, student loan, card minimums. |
| income | number | – | Gross income (before tax) |
| period | string | – | Income is |
No output schema declared.
No examples provided.
rent_vs_buy_calculator Rent vs. Buy Calculator ~254
This rent vs buy calculator weighs the true cost of owning – interest, tax, upkeep, lost returns and equity – against renting, to find the break-even year. Web page: https://calcbright.com/rent-vs-buy-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| appreciation | number | – | Home price growth / year (%) |
| buyCostPct | number | – | Buying closing costs (%) |
| currency | string | – | Currency |
| downPct | number | – | Down payment (%) |
| insurance | number | – | Home insurance / year |
| invest | number | – | Investment return / year (%) What the down payment could earn if invested instead |
| maintPct | number | – | Maintenance / year (%) % of home value |
| price | number | – | Home price |
| rate | number | – | Mortgage rate (%) |
| rent | number | – | Monthly rent |
| rentIncrease | number | – | Rent increase / year (%) |
| sellPct | number | – | Selling costs (%) Agent fees, transfer tax, etc. |
| taxPct | number | – | Property tax / year (%) % of home value |
| term | number | – | Loan term (years) |
| years | number | – | Years you plan to stay (years) |
No output schema declared.
No examples provided.
retirement_calculator Retirement Calculator ~160
$800 a month from age 35 at 7% grows to about $1.38 million by 65. This retirement calculator projects your nest egg and how long withdrawals will last. Web page: https://calcbright.com/retirement-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| age | number | – | Current age (years) |
| currency | string | – | Currency |
| monthly | number | – | Monthly contribution |
| rate | number | – | Expected return (before retiring) (%) |
| retireAge | number | – | Retirement age (years) |
| retireRate | number | – | Return during retirement (%) |
| savings | number | – | Current retirement savings |
| withdrawal | number | – | Monthly withdrawal in retirement |
| years | number | – | Years in retirement (years) |
No output schema declared.
No examples provided.
roi_calculator ROI Calculator ~116
Turning $10,000 into $15,000 is a 50% return, or 14.47% a year over 3 years. This ROI calculator shows total ROI, net profit and the annualized rate. Web page: https://calcbright.com/roi-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| currency | string | – | Currency |
| invested | number | – | Amount invested |
| returned | number | – | Amount returned (final value) |
| years | number | – | Investment length (optional) (years) Needed for annualized ROI. |
No output schema declared.
No examples provided.
roman_numeral_converter Roman Numeral Converter ~98
MCMXCIX is 1999 and 2026 is MMXXVI. Convert any number from 1 to 3999 into Roman numerals, or decode a numeral back to a number, with each symbol explained. Web page: https://calcbright.com/roman-numeral-converter
| Name | Type | Req | Description |
|---|---|---|---|
| mode | string | – | Convert |
| number | number | – | Number |
| roman | string | – | Roman numeral |
No output schema declared.
No examples provided.
roth_ira_calculator Roth IRA Calculator ~200
Check the 2026 Roth IRA limit ($7,500, or $8,600 at 50+) and the income phase-out for your MAGI, then project your tax-free balance against a taxable account. Web page: https://calcbright.com/roth-ira-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| age | number | – | Current age (years) |
| balance | number | – | Current Roth IRA balance |
| contribution | number | – | Annual contribution 2026 limit: $7,500, or $8,600 at 50+. |
| filing | string | – | Filing status |
| magi | number | – | Modified AGI (MAGI) |
| rate | number | – | Expected annual return (%) |
| retireAge | number | – | Retirement age (years) |
| taxRate | number | – | Tax on gains in a taxable account (%) Applied to growth each year – e.g. 15% long-term capital-gains rate. |
No output schema declared.
No examples provided.
rrsp_calculator RRSP Calculator ~242
New 2026 RRSP room is 18% of 2025 earned income, up to $33,810. See your room, the tax refund a contribution earns in your province and growth to retirement. Web page: https://calcbright.com/rrsp-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| age | number | – | Current age (years) |
| balance | number | – | Current RRSP balance |
| contribution | number | – | RRSP contribution |
| earned | number | – | Earned income 2025 Last year’s earned income sets this year’s new room (18%). |
| income | number | – | Taxable income 2026 Used to work out your tax refund. |
| pa | number | – | Pension adjustment (PA) Box 52 of last year’s T4, if you have a workplace pension. |
| rate | number | – | Expected annual return (%) |
| region | string | – | Province / territory |
| retireAge | number | – | Retirement age (years) RRSPs must be converted by the end of the year you turn 71. |
| unused | number | – | Unused room carried forward From your CRA notice of assessment. |
No output schema declared.
No examples provided.
rule_of_72_calculator Rule of 72 Calculator ~86
At 8% a year, money doubles in 72 ÷ 8 = 9 years. Enter any rate to compare the Rule of 72, the Rule of 69.3 and the exact compound-growth answer. Web page: https://calcbright.com/rule-of-72-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| rate | number | – | Annual rate of return (%) |
No output schema declared.
No examples provided.
salary_calculator Salary Converter ~140
$25 an hour is $52,000 a year at 40 hours a week. Convert pay between hourly, daily, weekly, bi-weekly, monthly and annual, with an optional after-tax estimate. Web page: https://calcbright.com/salary-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| amount | number | – | Pay amount |
| currency | string | – | Currency |
| days | number | – | Days per week |
| hours | number | – | Hours per week |
| period | string | – | Per |
| tax | number | – | Estimated tax rate (%) Optional: your approximate total tax & deduction rate. |
| weeks | number | – | Paid weeks per year |
No output schema declared.
No examples provided.
sales_tax_calculator Sales Tax Calculator ~133
Add sales tax to a price or pull it out of a receipt: $127.50 at 6.25% is $120 before tax. Works with any combined state, county and city sales tax rate. Web page: https://calcbright.com/sales-tax-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| amount | number | – | Price before tax |
| currency | string | – | Currency |
| mode | string | – | Calculation |
| rate | number | – | Your rate (optional) (%) Leave empty for the state/province rate, or enter your combined state + local rate. |
| region | string | – | State / province |
No output schema declared.
No examples provided.
sample_size_calculator Sample Size Calculator ~122
385 responses give ±5% at 95% confidence. Get the survey sample size for any confidence level, margin of error and proportion, with small-population correction. Web page: https://calcbright.com/sample-size-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| conf | string | – | Confidence level |
| margin | number | – | Margin of error (±%) |
| p | number | – | Expected proportion (%) Use 50% if unsure – it gives the largest, safest sample. |
| population | number | – | Population size Optional – leave blank for a large or unknown population. |
No output schema declared.
No examples provided.
saudi_end_of_service_calculator Saudi End of Service ~137
Saudi end of service award: half a month’s wage a year for the first 5 years, a full month after, reduced on resignation (Labour Law Art. 84–85). Web page: https://calcbright.com/saudi-end-of-service-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| end | string | – | End date Leave empty to use today's date. (YYYY-MM-DD) |
| reason | string | – | How did employment end? |
| start | string | – | Start date (YYYY-MM-DD) |
| wage | number | – | Last monthly wage Basic salary plus fixed allowances such as housing (as defined in your contract). |
No output schema declared.
No examples provided.
savings_goal_calculator Savings Goal Calculator ~108
Need $50,000 in 5 years? This savings goal calculator shows the monthly deposit to hit any target by your deadline, counting current savings and interest. Web page: https://calcbright.com/savings-goal-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| currency | string | – | Currency |
| current | number | – | Already saved |
| goal | number | – | Savings goal |
| rate | number | – | Annual interest / return (%) |
| years | number | – | Time to reach goal (years) |
No output schema declared.
No examples provided.
scientific_calculator Scientific Calculator ~136
Type 2^10 + √144 × sin(30) the way you would write it and get each step back. Handles powers, roots, trig, logs, factorials, nCr and π in degrees or radians. Web page: https://calcbright.com/scientific-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| angle | string | – | Angle unit |
| expr | string | – | Expression Use + − × ÷ ^ ( ) ! %, π, e and functions like sin, cos, tan, sqrt, ln, log, nCr(5, 2). 2π and 3(4+1) multiply automatically. |
No output schema declared.
No examples provided.
scientific_notation_converter Scientific Notation Converter ~128
299,792,458 is 2.99792458 × 10⁸. Convert any number to scientific, E- or engineering notation and back to standard form, digit-exact even at 10⁻³⁰⁰. Web page: https://calcbright.com/scientific-notation-converter
| Name | Type | Req | Description |
|---|---|---|---|
| number | string | – | Number Enter a standard number, E-notation (1.5E-7) or scientific notation (1.5 × 10^-7). |
| sig | number | – | Significant figures Optional – round the mantissa |
No output schema declared.
No examples provided.
self_employment_tax_calculator Self-Employment Tax Calculator ~197
1099 income? See the 15.3% SE tax on 92.35% of your profit, the half-SE deduction, 2026 federal income tax and what each quarterly estimated payment should be. Web page: https://calcbright.com/self-employment-tax-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| filing | string | – | Filing status |
| other | number | – | Other taxable income Spouse's wages if filing jointly, interest, etc. |
| profit | number | – | Net self-employment profit Schedule C income minus business expenses (1099 income after expenses). |
| qbi | string | – | 20% QBI deduction (Section 199A) |
| wages | number | – | W-2 wages (yours) Wages already subject to Social Security reduce the SE wage base. |
| withheld | number | – | Federal tax already withheld From W-2 paychecks – reduces the estimated payments you need to make. |
No output schema declared.
No examples provided.
shoe_size_converter Shoe Size Converter ~87
A US men's 9 is a UK 8.5, an EU 42.5 and 27 cm. Convert adult shoe sizes between US men's, US women's, UK, EU and Japanese cm before you order from abroad. Web page: https://calcbright.com/shoe-size-converter
| Name | Type | Req | Description |
|---|---|---|---|
| size | number | – | Size |
| system | string | – | Size system |
No output schema declared.
No examples provided.
significant_figures_calculator Sig Fig Calculator ~121
Does 0.004050 have 3 or 4 sig figs? Paste any number to see which digits are significant and the rule behind each one, then round it to as many as you need. Web page: https://calcbright.com/significant-figures-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| number | string | – | Number Type it exactly as written – trailing zeros matter. Scientific notation like 6.02e23 or 6.02 × 10^23 works too. |
| round | number | – | Round to (sig figs) Optional |
No output schema declared.
No examples provided.
simple_interest_calculator Simple Interest Calculator ~113
$10,000 at 5% for 3 years earns $1,500. This simple interest calculator applies I = P × r × t with the term in years, months or days and shows the total due. Web page: https://calcbright.com/simple-interest-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| currency | string | – | Currency |
| principal | number | – | Principal |
| rate | number | – | Annual interest rate (% / yr) |
| time | number | – | Time |
| unit | string | – | Unit |
No output schema declared.
No examples provided.
sip_calculator SIP Calculator ~103
₹10,000 a month for 10 years at 12% could reach ₹23.23 lakh. This SIP calculator splits a mutual fund maturity value into what you put in and what it earned. Web page: https://calcbright.com/sip-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| amount | number | – | Monthly SIP amount |
| currency | string | – | Currency |
| rate | number | – | Expected annual return (%) |
| years | number | – | Investment period (years) |
No output schema declared.
No examples provided.
sleep_calculator Sleep Calculator ~110
Up at 7:00 AM? Aim for bed at 9:45 or 11:15 PM. Count back whole 90-minute sleep cycles to pick a bedtime or alarm that lands in light sleep, not deep sleep. Web page: https://calcbright.com/sleep-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| latency | number | – | Time to fall asleep (min) |
| mode | string | – | I want to… |
| time | string | – | Wake-up time (HH:MM, 24-hour) |
No output schema declared.
No examples provided.
slope_calculator Slope Calculator ~103
Two points in, the whole line out: slope as a fraction, y = mx + b, point-slope and standard form, the angle, distance and midpoint, each with its working. Web page: https://calcbright.com/slope-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| x1 | number | – | x₁ |
| x2 | number | – | x₂ |
| y1 | number | – | y₁ |
| y2 | number | – | y₂ |
No output schema declared.
No examples provided.
social_security_calculator Social Security Calculator ~158
Claim at 62 and get 70% of your benefit; wait until 70 and get 124%. Estimate your PIA with the 2026 bend points and compare every claiming age from 62 to 70. Web page: https://calcbright.com/social-security-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| aime | number | – | Average indexed monthly earnings (AIME) Average of your highest 35 years of wage-indexed earnings ÷ 420. |
| birthYear | number | – | Year of birth |
| claimAge | number | – | Age you start benefits (years) |
| mode | string | – | Earnings input |
| salary | number | – | Average annual earnings Your typical career earnings in today's dollars, assuming 35+ years of work. |
No output schema declared.
No examples provided.
speed_distance_time_calculator Speed Distance Time ~137
150 km in 2 h 30 min is 60 km/h. Give any two of speed, distance and time to get the third, mixing km, miles, km/h and mph freely, with the working shown. Web page: https://calcbright.com/speed-distance-time-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| distUnit | string | – | Distance unit |
| distance | number | – | Distance |
| hours | number | – | Time – hours |
| minutes | number | – | Time – minutes |
| mode | string | – | Solve for |
| speed | number | – | Speed |
| speedUnit | string | – | Speed unit |
No output schema declared.
No examples provided.
square_footage_calculator Square Footage Calculator ~153
A 12 × 15 ft room is 180 sq ft. Measure rectangles, L-shaped rooms, circles or triangles and get sq ft, m², square yards, acres and the cost at your price. Web page: https://calcbright.com/square-footage-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| a | number | – | Length (ft) |
| b | number | – | Width (ft) |
| c | number | – | Part 2 length (ft) |
| currency | string | – | Currency |
| d | number | – | Part 2 width (ft) |
| price | number | – | Price per sq ft (optional) |
| shape | string | – | Shape |
| unit | string | – | Units |
No output schema declared.
No examples provided.
square_root_calculator Square Root Calculator ~97
√72 simplifies to 6√2 ≈ 8.4852813742. Get square, cube or any nth root to 10 decimal places, the simplest radical form and a check that squares back. Web page: https://calcbright.com/square-root-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| n | number | – | Root (index) 2 = square root, 3 = cube root… |
| x | number | – | Number |
No output schema declared.
No examples provided.
stamp_duty_calculator Stamp Duty Calculator ~106
UK stamp duty calculator 2026: SDLT in England & NI, LBTT in Scotland and LTT in Wales – with first-time buyer relief, second-home and non-resident rates. Web page: https://calcbright.com/stamp-duty-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| buyer | string | – | Buyer type |
| nonResident | string | – | Non-UK resident buyer? |
| price | number | – | Purchase price |
| region | string | – | Where is the property? |
No output schema declared.
No examples provided.
standard_deviation_calculator Standard Deviation Calculator ~91
Sample (n − 1) or population (N)? Paste your data and get both standard deviations, the variance and mean, with a deviation-by-deviation table you can check. Web page: https://calcbright.com/standard-deviation-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| numbers | string | – | Data set Separate values with commas, spaces or new lines. |
| type | string | – | Data is a… |
No output schema declared.
No examples provided.
student_loan_repayment_calculator UK Student Loan Repayment Calculator ~146
UK student loan repayment calculator for 2026/27: monthly repayments on Plans 1, 2, 4, 5 and Postgraduate, interest, years to repay and write-off. Web page: https://calcbright.com/student-loan-repayment-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| balance | number | – | Loan balance |
| growth | number | – | Salary growth per year (%) Thresholds are kept at their 2026/27 level. |
| plan | string | – | Repayment plan |
| salary | number | – | Annual salary (before tax) |
| yearsRepaying | number | – | Years since repayments started (years) Counts towards the write-off date. |
No output schema declared.
No examples provided.
take_home_pay_calculator Take-Home Pay Calculator ~241
Net pay after tax in 166 countries: $75,000 in Texas leaves about $61,592, £50,000 in the UK £39,520. Income tax and social contributions, line by line. Web page: https://calcbright.com/take-home-pay-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| bahrain | string | – | Nationality |
| country | string | – | Country |
| filing | string | – | Filing status |
| otherRate | number | – | Effective income tax rate (%) |
| provRate | number | – | Provincial income tax (effective) (%) Optional – provincial tax is added on top of federal tax, CPP and EI. |
| region | string | – | State |
| retirement | number | – | 401(k) / pre-tax contributions (% of pay) |
| salary | number | – | Gross annual salary |
| social | number | – | Social insurance contribution (%) There is no personal income tax. Nationals pay social insurance (e.g. GOSI, GPSSA) – enter your rate if it applies. |
| stateRate | number | – | State income tax rate (%) Your state has progressive rates – enter your approximate effective state rate. |
No output schema declared.
No examples provided.
tax_free_salary_equivalent_calculator Tax-Free Salary Equivalent ~194
Convert a tax-free Gulf salary (AED, SAR, QAR, KWD, BHD, OMR) into the gross salary you would need in the US, UK or Canada to take home the same pay. Web page: https://calcbright.com/tax-free-salary-equivalent-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| country | string | – | Compare with |
| from | string | – | Currency |
| provRate | number | – | Provincial income tax rate (effective) (%) Provincial tax is added on top of federal tax, CPP and EI – enter your approximate effective rate. |
| province | string | – | Province / territory |
| salary | number | – | Tax-free monthly salary in the Gulf Total monthly pay including housing and transport allowances. |
| state | string | – | State |
| stateRate | number | – | State income tax rate (effective) (%) This state has progressive brackets – enter your approximate effective rate. |
No output schema declared.
No examples provided.
tdee_calculator TDEE Calculator ~204
Your maintenance calories are BMR × an activity factor. Get yours with Mifflin–St Jeor or Katch–McArdle, plus daily targets to lose or gain 0.25–1 kg a week. Web page: https://calcbright.com/tdee-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| activity | string | – | Activity level |
| age | number | – | Age (years) |
| bodyFat | number | – | Body fat (optional, for Katch–McArdle) (%) Leave blank if you don’t know it – Mifflin–St Jeor only needs height, weight, age and sex. |
| cm | number | – | Height (cm) |
| ft | number | – | Height (ft) |
| inch | number | – | (in) |
| kg | number | – | Weight (kg) |
| lb | number | – | Weight (lb) |
| sex | string | – | Sex |
| units | string | – | Units |
No output schema declared.
No examples provided.
tfsa_calculator TFSA Calculator ~182
Eligible since 2009? Your TFSA limit is $109,000 in 2026. Subtract what you put in, add back past withdrawals, and see your room and how the account could grow. Web page: https://calcbright.com/tfsa-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| annual | number | – | Future yearly contribution |
| balance | number | – | Current TFSA balance |
| contributed | number | – | Total contributed so far All contributions ever, including 2026. |
| eligible | number | – | Year you turned 18 (or became a resident) Room starts in 2009 at the earliest. |
| rate | number | – | Expected annual return (%) |
| withdrawn | number | – | Withdrawals before 2026 Withdrawals made in 2026 are added back next year. |
| years | number | – | Years to grow (years) |
No output schema declared.
No examples provided.
time_duration_calculator Time Duration Calculator ~119
9:15 AM to 5:45 PM is 8 h 30 min, or 8.5 hours. Get the time between any two clock times, overnight shifts included, in hours and minutes, decimal and minutes. Web page: https://calcbright.com/time-duration-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| end | string | – | End time An end time earlier than the start is treated as the next day. (HH:MM, 24-hour) |
| start | string | – | Start time (HH:MM, 24-hour) |
No output schema declared.
No examples provided.
time_to_decimal_converter Time to Decimal Converter ~118
2 h 45 min is 2.75 hours, not 2.45. Turn hours, minutes and seconds into decimal hours for timesheets and payroll, or turn 7.8 h back into 7 h 48 min. Web page: https://calcbright.com/time-to-decimal-converter
| Name | Type | Req | Description |
|---|---|---|---|
| decimal | number | – | Decimal hours (h) |
| hours | number | – | Hours |
| minutes | number | – | Minutes |
| mode | string | – | Convert |
| seconds | number | – | Seconds |
No output schema declared.
No examples provided.
How do I install the CalcBright Calculators MCP server?
CalcBright Calculators is a hosted endpoint at https://calcbright.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · calcbright.com
claude mcp add --transport http com-calcbright-calcbright 'https://calcbright.com/mcp'
What is the CalcBright Calculators MCP server?
CalcBright Calculators is an MCP server listed in the public MCP registry as com.calcbright/calcbright. 160+ calculators: take-home pay for 166 countries, mortgage, loan, VAT, BMI, dates, units, currency. This page covers its hosted endpoint (https://calcbright.com/mcp).
Is the CalcBright Calculators MCP server safe to use?
CalcBright Calculators scores 64 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the CalcBright Calculators MCP server expose?
CalcBright Calculators exposes 167 tools: mortgage_calculator, loan_calculator, compound_interest_calculator, salary_calculator, percentage_calculator, and 162 more. Their descriptions and schemas cost roughly 22,761 tokens of context every time the server is loaded.
Does the CalcBright Calculators MCP server require authentication?
No. We connected to CalcBright Calculators without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the CalcBright Calculators MCP server still maintained?
CalcBright Calculators is still listed as active in the MCP registry. We last reached this channel on 18 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.