Paint Mixing Ratio Calculator

Work out how much medium, water or thinner to add to a quantity of paint at a given ratio.

Ratio of paint to medium

Custom ratio: parts medium parts

Only used when the choice above is set to the custom option.

Paint volume ml

The paint you are about to mix, in millilitres. A 37 ml tube is 37.

Coverage of the mixed paint sq m per litre

A thin wash behaves like a glaze at about 20 square metres per litre. Neat paint is nearer 10.

Layers you plan to apply

Used for the total area this batch will cover.

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Free calculator by Handcraft worked examples and methodology No account, nothing stored.