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Calculators that actually work.
123 free, ad-light tools for finance, health, math, development, and daily life. No signup, ever. Your inputs stay in your browser.
123 tools
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Popular calculators
Browse all by category →Mortgage Calculator
Monthly payment, total interest, and full amortization in seconds.
BMI Calculator
Body mass index using WHO categories. Metric and imperial units.
Percentage Calculator
Three modes in one. Find X%, reverse percent, or compute change.
Word Counter
Live count of words, characters, reading time, and readability.
Password Generator
Cryptographically secure passwords. Configurable length and characters.
Compound Interest
Year-by-year projection of savings growth at any rate and compounding.
EMI Calculator
Monthly installments for home, car, personal loans with amortization.
Tip Calculator
Split bills and calculate tips with per-person breakdowns.
Browse by category
Finance21 tools
Mortgages, loans, investing, retirement, budgeting, and everyday money.
Health16 tools
BMI, calories, macros, body fat, pregnancy, sleep, and fitness planning.
Math12 tools
Fractions, percentages, statistics, algebra, geometry, scientific calculator.
Text Tools12 tools
Word counter, case converter, lorem ipsum, word unscrambler for Scrabble.
Developer Tools19 tools
JSON formatter, Base64, regex tester, UUID, hashes, cron, color converter.
Utilities18 tools
Password generator, QR codes, IP tools, age calculator, time zones.
Construction & Home6 tools
Concrete, paint, flooring, fence, mulch, and square footage estimators.
Unit Converters6 tools
Length, weight, temperature, volume, data storage, time zones.
India13 tools
SIP, EMI, income tax (old + new regime), PPF, FD, HRA, GST, gratuity.
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We never see, store, or transmit your numbers. Calculations run locally.
Formulas you can verify
Every tool cites the formula it uses. Check our work against any textbook.
Fast on mobile
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Sanket Chaukiyal
Founder and editor, CalcMojo
I’m a technology editor with 12+ years in editorial, including six years as Sub Editor and Senior Copy Editor at Autocar India (Haymarket SAC Publishing) — one of India’s leading automobile magazines. Earlier I led editorial teams at Spenta Multimedia, producing custom-content publications for Tata Consultancy Services, HDFC Bank, and the National Sports Club of India.
My career started in technology — as a technical writer at Cognizant documenting networking systems, after several years as a freelance C#/.NET developer and contributor to Digit Magazine. That mix of editorial discipline and hands-on engineering is exactly what I apply to CalcMojo: every formula tested, every page edited, every calculation verifiable.
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