Fraction calculator
Enter two fractions like 1/2 and 1/3 and pick an operation.
Fraction calculator
Add, subtract, multiply or divide two fractions and get the answer simplified to lowest terms, plus the decimal value. Type each fraction as a/b (whole numbers also work). It all runs in your browser.
How fractions work
To add or subtract you put both over a common denominator; to multiply you multiply tops and bottoms; to divide you multiply by the reciprocal. The result is then reduced using the greatest common divisor. Example: 1/2 + 1/3 = 3/6 + 2/6 = 5/6.
Frequently asked questions
Does it simplify the result? Yes — the answer is always reduced to its lowest terms.
Can I use whole numbers? Yes — enter 3 and it’s treated as 3/1.