A ratio compares two quantities. A:B = A/B. For example, 3:2 means for every 3 of A, there are 2 of B. Ratios can be written as fractions, with a colon, or as decimals.

What is a proportion?

A proportion states that two ratios are equal: A/B = C/D. Cross-multiply to solve: A×D = B×C.

Where are ratios used?

Ratios are used in cooking (3:1 flour to water), finance (price-to-earnings), maps (1:50,000 scale), chemistry (solution concentrations), and everyday comparisons.

Ratio Calculator — Simplify & Solve Ratios

The Ratio Calculator simplifies a ratio A:B to its simplest form by dividing both values by their Greatest Common Factor (GCF). Ratios are used everywhere — in cooking (recipe scaling), maps, financial analysis, mixing solutions, and more. Enter the two values of your ratio to get the simplified form instantly.

Value A

Value B

How to Use This Calculator

1
Enter value A (the first number in the ratio).
2
Enter value B (the second number in the ratio).
3
Click Calculate — the result shows the simplified A value. Divide B by the same GCF to get simplified B.

Frequently Asked Questions

Divide both values by their Greatest Common Factor (GCF). For 12:8, the GCF is 4, so 12:8 simplifies to 3:2.

Related Calculators

🧮Fraction Calculator 🧮GCF Calculator 🧮Percentage Calculator