Ratio Calculator

Simplify a ratio to its lowest terms, or scale a ratio to find a missing value.

Enter a ratio to simplify it to lowest terms
:
Simplified Ratio
Enter a known ratio and one value to find the missing value
: = :
Missing Value

Simplifying Ratios

A ratio is simplified by dividing both terms by their greatest common divisor. For example, 12:18 simplifies to 2:3.

Scaling Ratios

If you know a ratio and one value in an equivalent ratio, you can find the missing value using cross-multiplication.

Frequently Asked Questions

A ratio is simplified by dividing both terms by their greatest common divisor. For example, 12:18 simplifies to 2:3.

If you know a ratio and one value in an equivalent ratio, you can find the missing value using cross-multiplication.

It simplifies a ratio to its lowest terms, or scales a ratio to find a missing value.

Yes, scaling a known ratio to find a missing value works for any proportional relationship, including recipes and mixing ratios.

A ratio like 12:18 simplifies to 2:3 by dividing both numbers by their greatest common divisor, which is 6.

Feedback
Was this tool helpful?
Share
How would you rate this tool?