Overview
What Is a Ratio Calculator?
This tool simplifies ratios to their lowest terms and can solve for a missing value in an equivalent ratio (like scaling a recipe or a map).
Simplify ratios and solve for missing values instantly.
This tool simplifies ratios to their lowest terms and can solve for a missing value in an equivalent ratio (like scaling a recipe or a map).
Useful for scaling recipes, mixing ratios, financial ratios, or any proportional relationship.
Input the two numbers of your ratio (A:B).
See the ratio reduced to its lowest terms automatically.
Divide both numbers by their greatest common factor - this calculator does this automatically.
It means both quantities are exactly equal.
Yes, though this calculator handles two-part ratios - three-part ratios (like 2:3:5) follow similar simplification logic.
A ratio compares two separate quantities, while a fraction represents a part of a whole - though they're calculated similarly.
Yes, though ratios are most commonly expressed in whole numbers after simplification.
Recipe scaling, aspect ratios, financial ratios, and mixing solutions all use ratio math.
Yes, 2:3 is different from 3:2 - order preserves which quantity is which.
This version simplifies ratios - for solving equivalent ratios, cross-multiply: if A:B = C:D, then A×D = B×C.
No - calculations happen entirely in your browser.
Yes, completely free with no sign-up required.