Fraction Calculator
Add, subtract, multiply and divide fractions with automatic simplification to lowest terms. — free, fast and private.
Your fraction result will appear here.
Example: 1/2 + 1/3 = 5/6 (≈ 0.8333).
How to use Fraction Calculator
- Enter the first fraction (numerator and denominator).
- Choose add, subtract, multiply or divide.
- Enter the second fraction.
- Click Calculate to see the simplified result and its decimal value.
Note: this tool runs in your browser. Nothing is uploaded.
Frequently Asked Questions
How do I add fractions?
Find a common denominator, add the numerators, then simplify. For example, 1/2 + 1/3 = 3/6 + 2/6 = 5/6.
How are fractions simplified?
Both the numerator and denominator are divided by their greatest common divisor (GCD) until no common factor remains.
Can I use negative fractions?
Yes. Enter a negative numerator for a negative fraction — the result keeps the correct sign.
Can I divide by a fraction?
Yes. Dividing by a fraction is the same as multiplying by its reciprocal — the calculator handles this automatically.