Fraction Calculator
Add, subtract, multiply and divide fractions and mixed numbers, simplify them and convert decimals to fractions.
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How to use
- Type fractions like 3/4, mixed numbers like 1 1/2, or decimals.
- Choose an operation to see the simplified result, mixed number and decimal.
- Use “Simplify a fraction” to reduce a fraction to lowest terms.
- Use “Decimal to fraction” to find exact and closest simple fractions.
How it works
All fraction arithmetic is exact — numerators and denominators are whole numbers of any size, never rounded. Repeating decimals are shown with the repeating digits in brackets, so 1/7 = 0.(142857). The closest simple fraction uses continued fractions, the standard way to find the best approximation with a limited denominator.
Limitations
- Decimal expansions are shown up to 60 digits.
Privacy
Your text is processed entirely in this browser tab. Nothing is uploaded, logged or saved by this tool.
Local processing protects your data from being uploaded, but it cannot protect against a compromised device or malicious browser extensions.