Fraction calculator
Add, subtract, multiply or divide fractions with exact reduced and mixed-number results. Change the inputs to update the chart or diagram.
Your inputs
The editable example is illustrative. Enter your own dimensions, operating data, prices, and fees. Results update as you edit.
Calculations run in your browser. Inputs are not saved or sent to analytics.
How it works
- / + / = ( + )/; / × / = /; ÷ GCD; q ≠ 0
- Worked example: 1/3 + 1/6 = 1/2; −1/2 × 2/3 = −1/3
- Supported input limits: : n ≤ 305; : n ≤ 305
Input and formula key
Your result
Complete the inputs to see your result.
Assumptions and limitations
Enter fractions, mixed numbers or finite decimals. Fraction arithmetic and reduction use exact integers; the decimal display may be rounded. A negative mixed number applies its sign to the entire value. Denominators and division operands cannot be zero.
Sources
- OpenStax — fraction arithmetic Sources reviewed: 2026-10-06
