Simplify Fraction Calculator

Enter numerator.
Enter denominator.
Math

Calculate simplify fraction with explicit inputs and a worked example.

Formula

Divide numerator and denominator by their greatest common divisor.

Example Calculation

Example inputs
  • Numerator: 12
  • Denominator: 18

12/18 reduces to 2/3.

Frequently asked questions

How do I use this calculator?

Enter numerator, denominator. The result updates automatically. Use Reset to restore the example values.

What method does it use?

Divide numerator and denominator by their greatest common divisor.. Follow the units and definitions shown with the inputs to apply this relationship consistently.

Why might a rounded result differ?

The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.

Are my inputs saved online?

No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.

Check the assumptions and units before using this result. Read about calculation methods.