How do you add or subtract fractions?

Put both fractions over a common denominator, add or subtract the numerators, then reduce. For example, 1/2 + 1/3 = 3/6 + 2/6 = 5/6. The calculator handles the common denominator and simplification for you.

Does it simplify the answer automatically?

Yes. Every result is reduced to lowest terms using the greatest common divisor, and also shown as a decimal and, where relevant, a mixed number.

Is anything uploaded when I use this?

No. All fraction arithmetic happens in your browser. Nothing you type is sent to a server or stored.

Fraction Calculator

Add, subtract, multiply and divide fractions with simplified answers.

Fraction calculator

Add, subtract, multiply or divide two fractions and get the answer in lowest terms — plus its decimal and mixed-number forms. For example, 1/2 + 1/3 = 5/6.

Enter both fractions, choose an operation, and the result updates instantly, all in your browser with nothing uploaded.