How this calculator works
Add, subtract, multiply, and divide fractions with step-by-step simplified results. Values are processed instantly on this device, with checks for missing values and invalid divisions.
Add: a/b + c/d = (ad + cb) / bd | Simplify: divide numerator and denominator by GCD
Worked example
Enter realistic values in each labeled field, select Calculate, and review both the primary answer and supporting details. Use Reset to clear the form before trying another scenario.
Frequently asked questions
What does the Fraction Calculator do?
Add, subtract, multiply, and divide fractions with step-by-step simplified results.
Are my values stored?
No. The calculation runs locally in your browser and the values are not submitted to us.
Can I rely on this result?
Use this as an informational estimate. Check measurements and source values before acting on the result.