Fraction Calculator
Enter two fractions and an operation to get the exact result, automatically reduced to its simplest form, plus its decimal equivalent — no rounding errors from converting to decimals first.
Calculators Runs entirely in your browser
All calculations happen on your device — nothing is sent to a server.
- Result (simplified fraction)
- 5 / 6
- Result (decimal)
- 0.833333
What this tool does
Performs arithmetic on fractions, giving the result both as a simplified fraction and as a decimal.
When to use it
- Working through maths exercises involving fractions.
- Adding quantities in a recipe written in fractions.
- Converting a fraction to a decimal or checking its simplification.
- Working with proportional measurements expressed as fractions.
How to use it
- Enter the numerator and denominator of each fraction.
- Choose the operation.
- Read the "Result (simplified fraction)" and the "Result (decimal)".
A practical example
Input
Adding 1/2 and 1/3.
Output
5/6 as a simplified fraction and 0.8333… as a decimal.
Limitations
- Denominators must be non-zero whole numbers, and you get a clear message if they are not.
- The decimal is approximate for recurring fractions such as a third.
- This handles simple fractions rather than algebraic expressions.
Privacy and processing
The fractions are computed on your device and are never sent to a server.
Technical notes
- Simplification divides numerator and denominator by their greatest common divisor, so the result is always in lowest terms.