Simplify Ratio Calculator

Simplify ratios instantly

Use this tool when you only need one thing: reducing a:b to its simplest form.

Example:

• 12:18 becomes 2:3
• 150:35 becomes 30:7

This page is part of our Ratio Calculator hub, where you can also convert ratios to percentages and scale dimensions.

How simplification works

1. Find the greatest common divisor (GCD)
2. Divide both sides of the ratio by that GCD
3. Keep order the same

simplified = (a / gcd(a,b)) : (b / gcd(a,b))