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Math & Everyday Calculators
9 free math and everyday calculators. All tools are free, instant, and require no signup.
Percentage Calculator
What is X% of Y, percentage change, increase and decrease
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Age Calculator
Exact age in years, months, days and hours. Zodiac sign included
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Tip Calculator
Tip amount, total bill, and per-person split for any group
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Unit Converter
Convert length, weight, temperature, volume, area and speed
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Discount Calculator
Sale price, savings, stacked discounts and original price finder
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Fraction Simplifier
Simplify, add, subtract, multiply and divide fractions
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Days Between Dates
Count days, weeks, months between dates. Holiday countdowns
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Time Duration Calculator
Hours and minutes between two times. Overnight shift support
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Roman Numeral Converter
Convert numbers to Roman numerals and back
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Free Math tools built for everyone
Every tool in this category runs entirely in your browser. Nothing you enter is stored on our servers or visible to us. These tools are designed to give you instant, accurate answers without friction — no account, no email, no cost.
Our goal is to provide the best free math tools available anywhere, maintained and updated regularly. If you find an error or want to suggest a new tool, let us know.