CalcBright Calculators

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How to connect

Add it to any MCP client that supports remote servers.

{
  "mcpServers": {
    "calcbright-calculators-2": {
      "type": "http",
      "url": "https://calcbright.com/mcp"
    }
  }
}

162 tools

• mortgage_calculator

  A $320,000 loan at 6.5% over 30 years is about $2,023 a month before escrow. Add property tax, insurance, PMI and HOA, and see the full amortization schedule. Web page: https://calcbright.com/mortgage-calculator

• loan_calculator

  Borrow 25,000 at 7.5% for 5 years and the EMI is about 501 a month. Get the installment, total interest and a month-by-month schedule for any fixed-rate loan. Web page: https://calcbright.com/loan-calculator

• compound_interest_calculator

  $10,000 at 7% compounded monthly grows to about $40,387 in 20 years. Add monthly contributions and compare daily, monthly or yearly compounding, year by year. Web page: https://calcbright.com/compound-interest-calculator

• salary_calculator

  $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

• percentage_calculator

  What is 15% of 200? What percent is 30 of 200? Solve percent-of, percentage change, increase and decrease questions, with the working shown for each step. Web page: https://calcbright.com/percentage-calculator

• age_calculator

  Your exact age in years, months and days from your date of birth, plus total weeks and days, the weekday you were born and how long until your next birthday. Web page: https://calcbright.com/age-calculator

• bmi_calculator

  70 kg at 1.75 m is a BMI of 22.9. Check your Body Mass Index in kg/cm or lb/ft, the healthy weight range for your height, your BMR and daily calorie needs. Web page: https://calcbright.com/bmi-calculator

• unit_converter

  Convert cm to inches, kg to lbs, °C to °F and more in 18 categories, from length and weight to torque, flow rate and density, using exact conversion factors. Web page: https://calcbright.com/unit-converter

• currency_converter

  Convert USD, EUR, GBP, INR, PKR, AED and 30+ other currencies at mid-market rates refreshed several times a day, with quick tables for common amounts. Web page: https://calcbright.com/currency-converter

• time_zone_converter

  9:00 AM in New York is 2:00 PM in London in summer. Convert any date and time between two cities with daylight saving applied for that date, plus a world clock. Web page: https://calcbright.com/time-zone-converter

• 401k_calculator

  A 401k calculator with the 2026 $24,500 limit and catch-ups built in: project your balance at retirement from your match, raises and returns, year by year. Web page: https://calcbright.com/401k-calculator

• amortization_calculator

  This amortization calculator splits every payment into principal and interest, shows your payoff date and what extra payments save, and exports to CSV. Web page: https://calcbright.com/amortization-calculator

• annuity_calculator

  An annuity calculator for fixed-term income: what a lump sum pays monthly over 10–30 years, or the pot needed for a target payment, level or rising yearly. Web page: https://calcbright.com/annuity-calculator

• apr_calculator

  A 7% loan with a $1,000 fee really costs 9.17%. This APR calculator folds origination fees and points into the true rate, payment and full cost of borrowing. Web page: https://calcbright.com/apr-calculator

• area_calculator

  Area of a rectangle, square, triangle, circle, trapezoid, parallelogram or ellipse from your measurements, with the formula and the working shown. Web page: https://calcbright.com/area-calculator

• auto_loan_calculator

  An auto loan calculator that counts sales tax, down payment and trade-in the way most US states do, then shows the car payment, interest and full schedule. Web page: https://calcbright.com/auto-loan-calculator

• average_calculator

  Paste a list of numbers to get the mean, median, mode, range, sum and count at once – with the working for each, so you can see why mean and median differ. Web page: https://calcbright.com/average-calculator

• bmr_calculator

  Your basal metabolic rate from Mifflin–St Jeor, revised Harris–Benedict and Katch–McArdle side by side, plus daily calorie needs at five activity levels. Web page: https://calcbright.com/bmr-calculator

• body_fat_calculator

  Body fat % from a tape measure with the US Navy (Hodgdon–Beckett) formula: enter neck, waist and hips to get your ACE category, fat mass and lean mass. Web page: https://calcbright.com/body-fat-calculator

• break_even_calculator

  How many units must you sell before you make a profit? Enter fixed costs, price and variable cost to get break-even units, revenue and contribution margin. Web page: https://calcbright.com/break-even-calculator

• btu_calculator

  Size an air conditioner or heater in BTU/h, tons and kW from room area, ceiling height, sun and occupants – with a Gulf climate setting for the UAE and Saudi. Web page: https://calcbright.com/btu-calculator

• budget_calculator

  Budget your take-home pay with the 50/30/20 rule – needs, wants and savings in monthly amounts – or set your own split, such as 60/20/20 for high-rent cities. Web page: https://calcbright.com/budget-calculator

• business_days_calculator

  Count Monday–Friday working days between two dates (January 2026 has 22), or add business days to a start date to find a shipping or contract deadline. Web page: https://calcbright.com/business-days-calculator

• cagr_calculator

  A CAGR calculator for the steady yearly rate between two values: $10,000 to $20,000 in 5 years is 14.87% a year. Use it for investments, revenue or users. Web page: https://calcbright.com/cagr-calculator

• calorie_deficit_calculator

  Your maintenance calories, a daily target for losing 0.25–1 kg (0.5–2 lb) a week and the weeks to your goal weight – never set below safe minimum intakes. Web page: https://calcbright.com/calorie-deficit-calculator

• calories_burned_calculator

  Calories burned walking, running, cycling, swimming, lifting and 20+ more activities, from Compendium MET values, your body weight and the time spent. Web page: https://calcbright.com/calories-burned-calculator

• canadian_mortgage_calculator

  Canadian mortgage payments with semi-annual compounding, CMHC premiums, the minimum down payment and accelerated bi-weekly or weekly options. Web page: https://calcbright.com/canadian-mortgage-calculator

• capital_gains_tax_calculator

  2026 US federal tax on a stock, crypto or property sale: long-term 0%, 15% or 20% versus short-term ordinary rates, plus the 3.8% NIIT where it applies. Web page: https://calcbright.com/capital-gains-tax-calculator

• car_lease_calculator

  Car lease payment from price, MSRP, residual, money factor or APR, term and sales tax – split into depreciation, finance charge and tax to check a dealer quote. Web page: https://calcbright.com/car-lease-calculator

• case_converter

  Switch text to UPPER, lower, Title or Sentence case, or to camelCase, snake_case and kebab-case for code. It all runs in your browser; nothing is uploaded. Web page: https://calcbright.com/case-converter

• cd_calculator

  A CD calculator for interest earned by maturity, with APY to APR conversion for any compounding – the same maths for Canadian GICs, UK bonds and GCC deposits. Web page: https://calcbright.com/cd-calculator

• circle_calculator

  Know a circle’s radius, diameter, circumference or area? Enter any one to get the other three, with the formulas, the working and answers in terms of π. Web page: https://calcbright.com/circle-calculator

• color_converter

  Convert any color between HEX, RGB, HSL, HSV and CMYK, preview the swatch, check WCAG 2 contrast on white and black, and get a palette of tints and shades. Web page: https://calcbright.com/color-converter

• commission_calculator

  Sales commission from the sale amount and rate, plus base salary for total pay – and a table comparing earnings at other rates. Works tier by tier too. Web page: https://calcbright.com/commission-calculator

• concrete_calculator

  Concrete for slabs, wall footings and post holes in cubic yards and cubic meters, plus how many 40, 60 or 80 lb or 25 kg premix bags to buy for the job. Web page: https://calcbright.com/concrete-calculator

• confidence_interval_calculator

  Confidence intervals for a mean (t or z) or a proportion (Wald and Wilson) at 80–99.9% confidence – margin of error, critical value and every step shown. Web page: https://calcbright.com/confidence-interval-calculator

• cooking_converter

  Cups, tablespoons and teaspoons to grams or ounces by each ingredient’s density – a cup of flour is 125 g, a cup of sugar 200 g. US cups, with charts. Web page: https://calcbright.com/cooking-converter

• countdown_calculator

  How many days until Christmas, New Year or your own date? See the days, weeks, months and hours left – or the days since a date that has already passed. Web page: https://calcbright.com/countdown-calculator

• credit_card_payoff_calculator

  Credit card payoff calculator: $5,000 at 22% APR, paying $200 a month, takes 34 months and $1,749.90 of interest. See your date, or the payment you need. Web page: https://calcbright.com/credit-card-payoff-calculator

• date_calculator

  Add or subtract days, weeks, months or years from any date to get the exact date and weekday – like 90 days from today. Leap years and month ends handled. Web page: https://calcbright.com/date-calculator

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