Overview

The Ratio Calculator performs ratio computations, solves for unknowns in proportions, and simplifies ratios. It is useful for scaling recipes, map scales, business allocation, and more.

Formula

Ratio = A : B = A/B

Proportion: A : B = C : D → A × D = B × C (cross multiplication)

Solving for unknown: A : B = C : x → x = (B × C) / A

Simplifying ratio: A : B = (A/GCD) : (B/GCD)

How to Use

1. 1Enter two numbers A and B to find their ratio.
2. 2To solve for an unknown in a proportion, enter the three known values.
3. 3For ratio simplification, enter two numbers and the result is divided by their GCD.
4. 4The result is automatically displayed in the simplest whole-number ratio.

Tips

• ✔Use proportions to scale a recipe from 2 servings to 6 servings and get exact ingredient amounts.
• ✔Always compare values in the same units when calculating ratios.
• ✔Ratios with three or more terms (A : B : C) can be handled by calculating each pair individually.

FAQ