Fraction Calculator
Add, subtract, multiply, or divide two fractions.
Worth Knowing
The trick to arithmetic with fractions is that addition and subtraction need a common denominator while multiplication and division don't — you multiply straight across, and you divide by flipping the second fraction and multiplying. This tool handles that bookkeeping and then reduces the answer to lowest terms using the greatest common divisor, so 2/4 comes back as 1/2. Keeping results reduced matters because two fractions can look different yet represent the same value.
How to Use
- Enter Numerator 1 into the first field of the Fraction Calculator.
- Fill in the rest: Denominator 1, Operation, Numerator 2, Denominator 2.
- Your result appears instantly as you type — there's no submit button or page reload.