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Fraction calculator

Use exact arithmetic to add, subtract, multiply, divide or simplify fractions and mixed numbers.

Get started

  1. Use the example values or enter your own measurements.
  2. Calculate, then copy the result or download the available details.

Example

Input

1 1/2 + 2/3

Expected result

13/6

Try it

Good to know

The calculation runs in your browser. Use consistent units in fields with no explicit unit.

Calculation method

Decimals are read as exact fractions. Arithmetic uses BigInt and reduces by the greatest common divisor. The decimal result is approximate.

ab+cd=ad+bcbd,b,d≠0\frac{a}{b}+\frac{c}{d}=\frac{ad+bc}{bd},\qquad b,d\ne0

Calculation mode

Arithmetic
  • First number
  • Operation · Add / Subtract / Multiply / Divide
  • Second number
Simplify or convert
  • Number
Fraction to decimal
  • Fraction or mixed number
  • Decimal places