Fraction calculator
Add, subtract, multiply or divide fractions with exact reduced and mixed-number results.
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.
Your result
Complete the inputs to see your result.
How it works
- a/b + c/d = (ad + bc)/bd; a/b × c/d = ac/bd; ÷ GCD; q ≠ 0
- Worked example: 1/3 + 1/6 = 1/2; −1/2 × 2/3 = −1/3
- Supported input limits: First fraction or finite decimal: n ≤ 305; Second fraction or finite decimal: n ≤ 305
Assumptions and limitations
Choose the mode and enter only its required values. Division by zero is rejected or shown as undefined. Integer bases and fractions retain exact integer arithmetic; rounded decimal displays do not replace it. List statistics describe the supplied observations only; weighted mode changes the mean, not the order statistics.
Sources
- OpenStax — fraction arithmetic Sources reviewed: 2026-10-06
