Ratio Calculator
Simplify any ratio to its lowest terms, convert to percentages, and scale to a specific total. This free calculator supports both two-part and three-part ratios for cooking, mixing, construction, and more.
A ratio expresses the relative sizes of two or more values. Ratios are used everywhere: recipes (flour to water), map scales, financial analysis, mixing solutions, and architectural proportions.
Simplifying Ratios:
To simplify a ratio, divide all parts by their greatest common divisor (GCD). For example, 12:8 simplifies to 3:2 because GCD(12, 8) = 4.
Scaling Ratios:
To scale a ratio to a specific total, divide the total by the sum of the ratio parts, then multiply each part by that factor. For a 3:2 ratio scaled to 100: each unit = 100/5 = 20, so the parts are 60:40.
Ratios differ from fractions in that they compare parts to parts, while fractions compare a part to the whole. However, ratios and fractions are closely related and often interconvertible.