CB
Ratio Calculator
Simplify ratios, scale ratios up or down, and solve missing ratio values.
What this tool helps with
A simple, broad-use everyday calculator designed to answer one clear question quickly.
Enter your values, review the result and use the related guide if you want the formula explained step by step. The page is designed to answer both quick utility intent and follow-up informational intent.
1) Simplify a ratio
Simplified ratio
2:3
2) Solve a missing ratio value
Calculated value
20
Quick examples
Question
Input
Result
Simplify 12:18
12 and 18
2:3
3:4 scaled from 15
3, 4, 15
20
5:8 scaled from 10
5, 8, 10
16
FAQ
How do you simplify a ratio?
Divide both numbers by their greatest common divisor.
How do you solve an equivalent ratio?
Find the scale factor from the known part, then multiply the matching part by the same factor.