Paint coverage is fundamentally a relationship between the total surface area you need to coat and the amount of paint that can be spread per unit volume. In hobby modelling, the surface is usually measured in square centimeters (cm²) because kits are small and detailed. Knowing the exact area helps you avoid both waste and insufficient coverage.
Most manufacturers quote a coverage rate that assumes a single, even coat. When you apply multiple coats, the required paint volume scales linearly with the number of coats. This is why hobbyists often calculate the total paint needed before starting a project.
A = total surface area (cm²)
C = number of coats
R = coverage rate per litre per coat (cm²/L)
By rearranging the formula you can quickly estimate how many milliliters of paint you’ll need for any model kit, ensuring you have enough material to achieve a flawless finish.
How do I measure the surface area of my model kit?
What is the standard coverage rate for hobby paints?
How do I calculate the amount of paint needed for multiple coats?
Can this calculator help with large-scale models too?
What should I consider when choosing paint for my model kit?
How do I apply multiple coats evenly?
Is there a way to adjust the calculator for different paint brands?
Results are for informational purposes only and do not constitute professional advice.