Fraction calculator

Type two fractions and pick an operation: the answer is simplified and also shown as a decimal.

Fraction calculator

Operation

Result

1/2Simplified fraction

As a decimal
0.5

Fraction calculator

Inputs

Fraction 1 — top
1
Fraction 1 — bottom
3
Operation
+
Fraction 2 — top
1
Fraction 2 — bottom
6

How it is calculated

Addition: a/b + c/d = (a×d + c×b) / (b×d), then simplify by the greatest common divisor.

Result

Simplified fraction

1/2
As a decimal
0.5

How it is calculated

  1. Addition: a/b + c/d = (a×d + c×b) / (b×d), then simplify by the greatest common divisor.
  2. Division: a/b ÷ c/d = a/b × d/c.
  3. Calculations are exact (whole numbers), with no rounding.

Example

1/3 + 1/6 = 2/6 + 1/6 = 3/6 = 1/2.

Good to know

  • Enter whole numbers. The bottom number cannot be 0.

Frequently asked questions

What is this tool used for?

Type two fractions and pick an operation: the answer is simplified and also shown as a decimal.

How is the result calculated?

Addition: a/b + c/d = (a×d + c×b) / (b×d), then simplify by the greatest common divisor.

What should I check before using the result?

Enter whole numbers. The bottom number cannot be 0.

Updated October 10, 2026

Indicative result. For an important decision, check with a professional.