How do I simplify a ratio?

Divide both sides by their greatest common divisor. The ratio 12:18 becomes 2:3 after dividing both by 6. The calculator simplifies any ratio to its lowest terms automatically.

How do I find a missing value in a ratio?

Set up a proportion and cross-multiply. If a:b equals c:d and you know three values, multiply the known pair and divide by the remaining known value to solve for the missing one.

What is an equivalent ratio?

Equivalent ratios represent the same relationship scaled by a common factor. 1:2, 2:4, and 3:6 are all equivalent because they express the same proportional relationship.

How do I compare two ratios?

Convert both to the same unit or cross-multiply to compare. For 3:4 versus 5:6, compare 3 × 6 = 18 with 4 × 5 = 20, so 5:6 is the larger ratio. The calculator can do this comparison directly.

How do ratios relate to fractions?

A ratio a:b can be read as the fraction a/b. Ratios compare parts to parts or parts to a whole, while fractions usually compare a part to a whole. Converting between them is straightforward.

Ratio Calculator

Simplify ratios, solve for missing values, or compare two ratios. The ratio calculator handles the three common ratio problems quickly, giving the reduced form and the relationship between terms.