Paint Mix Ratio Calculator
Enter a 2- or 3-part mixing ratio and the total volume you need, and get the exact amount of each color to measure out.
Mix breakdown
How the split works
The calculator adds up your ratio parts, then gives each color the same share of the total volume that it holds of the ratio. A 3:2:1 ratio mixed to 60 mL comes out to 30 mL, 20 mL, and 10 mL — each color keeps its proportion of the whole regardless of how much you're mixing, so you can scale a small test batch up to a full bottle without changing the resulting color.
Measure with a syringe or graduated mixing cup for the most repeatable results, and write the ratio down once you're happy with a match — it's the only record you'll need to mix it again.
Frequently Asked Questions
What is a paint mixing ratio like 3:2:1?
It means for every 3 parts of the first color, you add 2 parts of the second and 1 part of the third — the actual unit (mL, drops, capfuls) doesn't matter as long as you're consistent. The calculator turns that ratio into exact millilitre amounts for whatever total volume you need.
Why mix by ratio instead of eyeballing it?
A custom color blend — say, matching a faded original paint or creating a unique livery — is very hard to reproduce by eye once the first batch runs out. Recording the ratio (and reusing this calculator) means you can mix an identical second batch for touch-ups or a whole fleet of models.
Can I use this for airbrush thinning too?
Yes — a paint-to-thinner ratio for airbrushing works the same way as a color-mixing ratio; just treat the thinner as one of the parts. For pin washes and weathering specifically, the dedicated weathering wash ratio calculator also converts the split into dropper counts.
Educational tool only. This splits a ratio you provide into volumes — it does not predict what color two paints will produce when blended; test a small batch first.