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Ratio Calculator

Easy Ratio Calculator tool to calculate, simplify, compare, and scale ratios instantly for math, finance, design, and daily use.

Ratio Mode

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=
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Leave one field empty or enter 0 to solve for it.

Part A
Part B

Calculated Proportion

Simplified Ratio2 : 3
Decimal Value0.6667
Percentage (A of B)66.6667%
Greatest Common Factor1
Inverse Ratio3 : 2

Note: Ratios express the quantitative relationship between two amounts, showing how many times one value contains or is contained within the other.

Proportion Solver

Solve for missing variables in any proportion (A:B = C:D). Simply input three values and the calculator instantly finds the fourth using cross-multiplication logic.

Ratio Simplification

Enter any ratio and our engine will automatically reduce it to its simplest mathematical form using the Greatest Common Divisor (GCD) method.

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