➗ Math
Fraction Calculator
Fraction arithmetic follows four rules: for addition and subtraction you need a common denominator, while multiplication and division work directly across. Reducing the result to lowest terms uses the greatest common divisor.
How it works
First numerator
First denominator
Operation
Second numerator
Second denominator
Result
Decimal value
Numerator
Denominator
Frequently asked questions
How do I use the Fraction Calculator?
Fill in the fields above — the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.