How does dividing by ratio work?

Enter an amount and it splits proportionally, e.g. $100 at 3:2 gives $60 and $40.

Where are ratios used?

Recipes, maps, finance splits, screen aspect ratios, and mixing anything proportionally.

Ratio Calculator

Simplify, scale and split by ratio

First side (A)

Second side (B)

Result

2 : 3

Divide both sides by their greatest common divisor, 6.

Simplify reduces a ratio to lowest terms, Scale multiplies every side by the same factor, and Divide amount splits a total across ratio parts. Everything is calculated instantly in your browser. Nothing is sent or stored anywhere.

About this tool

Ratios show up in recipes, business splits and design, but the arithmetic trips people up. Simplify 12:18, scale a 2:3 recipe to serve twelve, or split a bill 3:2:1.

One tool handles all three jobs with clear explanations of each result. Quick, visual, and free.