Estimate how much area your paint can cover based on paint amount, number of coats, and product coverage rate in gallons or liters.
Basic formula:
Total coverage = paint amount × coverage rate
With coats:
Usable coverage = total coverage ÷ number of coats
This calculator estimates how much area your paint can cover after accounting for the number of coats.
Knowing paint coverage helps you estimate whether you have enough paint for a room, wall, ceiling, or larger project before you start.
It can also help when comparing product labels and deciding how much paint to buy.
Your result shows the estimated area that your paint amount can cover based on the entered coverage rate. The total is adjusted based on the number of coats you plan to apply.
If the surface is rough, textured, or porous, your real-world coverage may be lower than the estimate. Always compare results with the manufacturer’s label on the paint container.
Many paints cover around 300 to 400 square feet per gallon, but the actual amount varies by product and surface.
Yes. More coats reduce the total area that your paint amount can cover because the coverage is divided across each coat.
Usually yes. Rough or textured surfaces often need more paint than smooth walls because they absorb more and have more surface area.
Yes. This calculator supports both gallons with square feet and liters with square meters.