Simplify Fraction Calculator

Reduce a fraction to lowest terms.

Quick answer: Simplify Fraction Calculator: Reduce a fraction to lowest terms. Everything runs in your browser, so nothing you enter is uploaded or stored.

Numerator

Denominator

How to use Simplify Fraction Calculator

Enter your values in the fields.
The results update instantly as you type.
Note or copy the numbers you need.

Features

Instant results
Free, no signup
Runs in your browser, nothing is uploaded
Works on phone and desktop

Formula

Divide numerator and denominator by gcd(n, d).

Worked example

12/18 simplifies to 2/3.

Frequently asked questions

How do I simplify a fraction?

Divide the top and bottom by their greatest common factor.

What is the GCF of 12 and 18?

6, so 12/18 becomes 2/3.

Is the Simplify Fraction Calculator free?

Yes. It is free, needs no signup and works on any device.