Ratio and proportion calculator for splitting a total

Split a total quantity in a chosen ratio.

Rules reviewed: BS / EN
01

Your inputs

Starting values are an example. Replace them with your own.

Your inputs stay in your browser.

02

Your result

Enter your details and run the calculation.

About this result

Informational calculations. Check assumptions, dates and jurisdiction before making a decision.

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How do you split an amount in a ratio?

The calculator adds the ratio parts and divides the total by that sum. The first share is total × A / (A + B) and the second is total × B / (A + B). For 100 KM in a 2 to 3 ratio that is 40 KM and 60 KM. It also shows the ratio A/B as a decimal, which helps with recipes, mixtures and splitting costs.

METHOD

Formula and method

First share = total × A/(A+B); second = total × B/(A+B).

TRACEABLE

Sources and validity

Basic arithmetic or geometry using the formula shown. Uses only your inputs.

How we maintain data