Fraction Calculator
Fraction calculator: add, subtract, multiply and divide fractions, with the simplified result, mixed number and decimal.
ab ± cd = ad ± bcbd
How to use this calculator
- Type your input in the box.
- The result updates as you type.
- Use “Copy result” or “Copy link” to share it.
Enter two fractions and an operation. The result is reduced to lowest terms and also shown as a mixed number and a decimal.
To add or subtract, fractions are brought to a common denominator; to divide, multiply by the reciprocal.
Worked example
1/2 + 1/3 = 3/6 + 2/6 = 5/6 ≈ 0.8333.
Frequently asked questions
How do I add fractions with different denominators?
Multiply across to a common denominator: a/b + c/d = (ad + bc)/bd, then simplify.
How do I divide fractions?
Multiply the first by the reciprocal of the second: (3/4) ÷ (2/3) = 9/8 = 1 1/8.