Fraction calculator
Working with fractions by hand means finding common denominators, flipping divisors, and reducing answers — easy to slip up on. This calculator adds, subtracts, multiplies or divides two fractions and returns the result in lowest terms, along with its decimal and mixed-number equivalents, so you can check homework or recipe scaling instantly.
How it works
The tool applies the standard rules for each operation, then simplifies:
- Add / subtract: rewrite both fractions over a common denominator, combine the numerators.
- Multiply: multiply numerators together and denominators together.
- Divide: invert the second fraction and multiply.
Every answer is reduced to lowest terms by dividing numerator and denominator by their greatest common divisor (GCD), and is also expressed as a decimal and, if the value exceeds 1, as a mixed number.
Example
Adding 1/2 + 1/3: the common denominator is 6, so 1/2 = 3/6 and 1/3 = 2/6; 3/6 + 2/6 = 5/6 (already in lowest terms) = 0.8333…
| Operation | Example | Result |
|---|---|---|
| Add | 1/2 + 1/3 | 5/6 |
| Subtract | 3/4 − 1/4 | 1/2 |
| Multiply | 2/3 × 3/4 | 1/2 |
| Divide | 1/2 ÷ 1/4 | 2 |
Enter both fractions, choose an operation, and the result updates instantly — all in your browser, with nothing uploaded.