Ratio Calculator - thecalculatorcenter.com

Use this free Ratio Calculator to simplify ratios, compare values, and find missing numbers in equivalent ratios. It is quick, easy, and helpful for school, math homework, cooking, business, and everyday calculations.

Simplify a ratio or solve a missing value in an equivalent ratio.

First Number

Second Number

Enter 3 values and leave 1 box empty to find the missing number.

: = :

First Ratio – Left

First Ratio – Right

Second Ratio – Left

Second Ratio – Right

How This Ratio Calculator Works

A ratio compares two numbers and shows their relationship. For example, 12:18 can be simplified to 2:3. This calculator helps you simplify ratios and solve equivalent ratios when one value is missing. It is useful for math, recipes, scaling, finances, and many real-life situations.

Why Use a Ratio Calculator?

Quickly simplify ratios to their lowest terms
Easily solve missing values in equivalent ratios
Save time compared to manual calculations
Reduce errors when working with numbers
Helpful for students learning math concepts
Useful for cooking, scaling recipes, and measurements
Great for budgeting, business, and financial comparisons
Works instantly on both desktop and mobile devices

Ratio Calculator FQAs

What is a ratio?

A ratio compares two quantities. It can be written in different forms, such as 2:3, 2 to 3, or 2/3.

How do you simplify a ratio?

To simplify a ratio, divide both numbers by their greatest common divisor. For example, 12:18 becomes 2:3.

What is an equivalent ratio?

Equivalent ratios have the same value even though the numbers are different. For example, 2:3 and 4:6 are equivalent ratios.

Where are ratios used in real life?

Ratios are used in cooking, maps, school math, construction, budgeting, business, and comparing quantities.