Fraction Calculator
Add, subtract, multiply, or divide two fractions and see the simplified result.
| Fraction 1 | / |
| Operation | |
| Fraction 2 | / |
Result
Your result will appear here.
Notes
Results are shown as a simplified fraction, as a mixed number when applicable, and as a decimal.
How it works
Fractions represent parts of a whole (numerator/denominator). Operations follow standard fraction rules and results can be simplified.
Formulas
- Add/subtract: use a common denominator, e.g. a/b ± c/d = (ad ± bc) / bd
- Multiply: (a/b) × (c/d) = ac / bd
- Divide: (a/b) ÷ (c/d) = ad / bc (when c ≠ 0)
- Simplify by dividing numerator and denominator by their greatest common divisor (GCD).
Worked example
1/2 + 1/3 = 3/6 + 2/6 = 5/6.
For general information and learning.
How to use the Fraction Calculator
It takes a few seconds, and every figure is calculated in your browser.
- Enter the fraction 1.
- Choose the operation.
- Enter the fraction 2.
- Press Calculate — the result appears in the dark panel beside the form.
- Use Copy, CSV, Share or Print under the result if you want to keep it.
Fraction Calculator — frequently asked questions
What formula does the Fraction Calculator use?
Add/subtract: use a common denominator, e.g. a/b ± c/d = (ad ± bc) / bd Multiply: (a/b) × (c/d) = ac / bd Divide: (a/b) ÷ (c/d) = ad / bc (when c ≠ 0) Simplify by dividing numerator and denominator by their greatest common divisor (GCD).
How does the Fraction Calculator work?
Fractions represent parts of a whole (numerator/denominator). Operations follow standard fraction rules and results can be simplified.
What assumptions and limitations should I know about?
Results are shown as a simplified fraction, as a mixed number when applicable, and as a decimal.
Can you walk through a worked example?
1/2 + 1/3 = 3/6 + 2/6 = 5/6.
Last updated 10 November 2026 · Formula, worked example and assumptions are documented above, and every result is calculated in your browser.