Ratio Calculator

A ratio compares two or more quantities. It shows how much of one quantity exists compared with another.

For example, the ratio 2:3 means that for every 2 units of the first quantity, there are 3 units of the second quantity.

Ratios can be simplified by dividing all parts by their greatest common divisor.

Equivalent ratios have the same relationship between their quantities.

For example:

2:3 = 4:6 = 6:9 = 8:12

You can create equivalent ratios by multiplying or dividing both parts of a ratio by the same non-zero number.

Ratios are commonly used in cooking recipes, maps, construction, finance, mathematics, chemistry, sports statistics and everyday comparisons.

They are especially useful when quantities need to be scaled while maintaining the same relationship.

What is a ratio?

A ratio compares two or more quantities and describes their relative relationship.

How do I simplify a ratio?

Divide all parts of the ratio by their greatest common divisor.

What is the simplest form of 12:18?

The greatest common divisor is 6, so 12:18 simplifies to 2:3.

What are equivalent ratios?

Equivalent ratios represent the same relationship even though their numbers are different.

Can ratios contain decimals?

Yes. Decimal ratios can be converted to equivalent whole-number ratios when appropriate.

What is a proportion?

A proportion is a statement that two ratios are equal.

Is this Ratio Calculator free?

Yes. Fashnza's Ratio Calculator is free to use.

Does the calculator store my numbers?

No account is required. Calculations are performed directly in your browser.