Fraction Calculator
Add, subtract, multiply, or divide two fractions and reduce the exact result.
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How to use Fraction Calculator
Fraction arithmetic uses exact BigInt integer operations and greatest-common-divisor reduction. The denominator is normalized to a positive value.
- Enter first numerator, first denominator, second numerator, second denominator.
- Check the selected calculation options and input units.
- Run the calculator, review the result, then copy or download it.
Good to know
- Numerators and denominators must be whole numbers from −1 trillion to 1 trillion. Denominators and a divisor fraction must not be zero.
- Decimal inputs have at most 120 characters and magnitude from 1e-100 to 1e15, or zero. Floating-point results are rounded to 12 significant digits; extreme derived results may underflow or be rejected. Exact integer results are identified separately.
Common questions
What calculation does Fraction Calculator perform?
Fraction arithmetic uses exact BigInt integer operations and greatest-common-divisor reduction. The denominator is normalized to a positive value.
Why is the decimal result labeled approximate?
The reduced fraction is exact; conversion to JavaScript floating point can round a repeating decimal.
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