How to use the Fraction Calculator
- Enter the first fraction (add a whole number for a mixed number like 1 ⅔).
- Choose +, −, × or ÷ and enter the second fraction.
- Read the simplified answer, the mixed number, the decimal and the steps.
- Use Decimal to fraction to turn 0.375 into ⅜.
How to work with fractions
- Add or subtract: rewrite both fractions over a common denominator, then add or subtract the numerators. ¾ + ⅔ = 9⁄12 + 8⁄12 = 17⁄12.
- Multiply: multiply the numerators and the denominators. ¾ × ⅔ = 6⁄12 = ½.
- Divide: multiply by the reciprocal of the second fraction. ¾ ÷ ⅔ = ¾ × 3⁄2 = 9⁄8.
- Simplify: divide the numerator and denominator by their greatest common divisor.
Mixed numbers (like 1 ⅔) are turned into improper fractions (5⁄3) first. For everyday percentages use the Percentage Calculator; for full expressions, the Scientific Calculator.
Also searched as: adding fractions, simplify fractions, mixed number calculator, fraction to decimal, decimal to fraction, dividing fractions, multiplying fractions.
Tools that pair well with the Fraction Calculator
- Standard Deviation Calculator — Paste a list of numbers — from a spreadsheet, separated by commas, spaces or new lines — and get the standard deviation (sample and population), variance, mean, median, mode, range and quartiles, with the steps.
- Number Base Converter — Type a number in any base and see it in all the others instantly.
- GPA Calculator — Add each course, its credits and your letter grade to get your semester GPA on the 4.0 scale — weighted for honors and AP classes — and your new cumulative GPA.
- Roman Numeral Converter — Convert any number from 1 to 3,999,999 into Roman numerals — or read Roman numerals back as numbers — with a breakdown of every symbol.
Frequently asked questions
How do I add fractions with different denominators?
Find a common denominator (the least common multiple), convert both fractions, then add the numerators. The steps are shown under the answer.
How do I enter a mixed number?
Type the whole number in the left box and the fraction in the numerator and denominator boxes, for example 1 and 2⁄3 for 1 ⅔.
How do I convert a decimal to a fraction?
Use Decimal to fraction: 0.375 becomes 3⁄8. Repeating decimals are approximated to the closest simple fraction.
Can I install Fraction Calculator as a web app and use it offline?
Yes. Fraction Calculator is an installable web app (PWA) — installed from your browser, not downloaded from an app store. Click Install app at the top of this page in Chrome or Edge (Windows, macOS, Linux, ChromeOS) or on Android, use Share → Add to Home Screen on iPhone and iPad, or File → Add to Dock in Safari 17+ on a Mac. It then opens in its own window with its own icon, and because it runs entirely in your browser it keeps working offline. Firefox on desktop can’t install web apps. How installing works.