Calculators
Fast, free calculators for everyday tasks. Every result runs locally in your browser.
Popular calculators
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Basic
Basic Calculators
Free basic calculators for everyday arithmetic, percentages and fractions. Use the keypad or keyboard with no sign-up.
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Finance
Finance Calculators
Free finance calculators: loan and mortgage payments, compound interest growth, percentages, discounts, sales tax, tips, and salary conversions.
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Health
Health & Fitness Calculators
Free health and fitness calculators: BMI, daily calorie needs (TDEE), BMR, body fat percentage, ideal weight, and pregnancy due date.
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Date & Time
Date & Time Calculators
Free date and time calculators: exact age in years, months and days, days between dates, add or subtract from a date, time arithmetic, and work hours.
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Math
Math Calculators
Free math calculators: fractions, mean/median/mode, standard deviation, GPA and weighted grades, and a cryptographically secure random number generator.
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Converters
Unit Converters
Free unit converters between metric and imperial: cm–inches, kg–lbs, Celsius–Fahrenheit, miles–km, feet–meters, ml–oz, and an all-in-one converter.
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Tools
Text & Other Tools
Free browser-based tools: a cryptographically secure password generator, a live word and character counter, and an all-in-one unit converter. No sign-up.
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About CalcNest
CalcNest provides focused calculators for money, health, dates, math and unit conversion. Each page shows the formula or method so you can understand and verify the result.
There is no account and no calculation history on our servers. The values you enter are processed locally in your browser.