Fraction Calculator

Type fractions like 3/4 or mixed numbers like 1 2/3, then choose the operation.

How it is calculated

a/b + c/d = (ad + bc) ÷ bd a/b − c/d = (ad − bc) ÷ bd a/b × c/d = ac ÷ bd a/b ÷ c/d = ad ÷ bc

The result is simplified by dividing by the greatest common divisor.

2/3 + 3/4 = (8 + 9) ÷ 12 = 17/12 = 1 5/12 ≈ 1.4167.

How do I type a mixed number?

Whole number, a space, then the fraction — e.g. 2 1/2.

Can I enter decimals?

Yes, e.g. 0.75, which is converted to a fraction.

How do I simplify one fraction?

Choose “simplify” and enter it in the first box.