Mixing Ratio Calculator

Split a target batch total into the exact amount of each component using a parts based mixing ratio.

Mixing ratio calculator

Part A ratio

Part B ratio

Part C ratio, use 0 for two parts

Total amount you need

Part A: —

Part B: —

Part C: —

Ratio total: — · Shares: —

—

Enter the ratio parts and the total you need; the batch is split in exactly the same proportion.

Common questions about the free online mixing ratio calculator.

Enter the parts of each component, then the total amount you need. The batch is split in exactly the same proportion.

It means four parts of the first component to one part of the second, so a ten litre batch uses eight litres and two litres.

Add the parts together, divide the total by that sum to get one part, then multiply by each part of the ratio.

Yes. Set the third part to zero to ignore it, or enter a value to split the batch across three components.

Yes. Paint, resin, mortar, concrete, fertiliser and chemical blends all use the same simple parts based arithmetic.

Use whatever the product instructions specify. Weight is more accurate for powders, while volume is common for liquids.

No. The batch figures are calculated locally in your browser and nothing you enter is sent to a server.

Yes. It is completely free, needs no sign-up and places no limit on the number of mixes you can plan.

Last updated: October 10, 2026