How to use this fraction calculator
Enter the values requested above and select Calculate. Change any input to compare another scenario. The calculation runs locally in your browser and does not require an account.
Formula and method
Example
For 2/3 + 5/8, the common denominator is 24, so 16/24 + 15/24 = 31/24.
Tips for a useful result
Enter whole-number numerators and nonzero denominators for exact reduced results.
What this calculator is useful for
Add, subtract, multiply or divide two fractions and reduce the result to lowest terms. The result is intended for quick estimates, checking arithmetic and comparing scenarios. When a result affects a contract, tax filing, medical decision, building-code requirement or other high-stakes situation, verify the result with the appropriate professional or authoritative source.
Frequently asked questions
What does the Fraction Calculator calculate?
Add, subtract, multiply or divide two fractions and reduce the result to lowest terms.
How does the Fraction Calculator work?
For addition and subtraction, use a common denominator. For multiplication, multiply numerators and denominators. For division, multiply by the reciprocal.
Is the Fraction Calculator free to use?
Yes. ERICH Calculators is free to use and does not require an account.