Paint Coverage Calculator
Calculate how many gallons of paint you need for any room or surface.
About this Calculator
Paint coverage is typically 350–400 sq ft per gallon for smooth surfaces, less for textured or porous walls. This calculator accounts for room dimensions, number of coats, doors and windows (which you won't paint), surface texture, and whether you're painting ceiling and trim too. Enter all dimensions to get gallons needed per coat and total gallons — saving you extra trips to the hardware store.
paint calculatorgallons of paintpaint coveragepaintingroom size