Find how many gallons of paint cover your walls and ceilings.
Each coat covers the whole area, so multiply the surface by the number of coats before dividing by the per-gallon coverage. Rounding up gives gallons to buy. Estimating paint honestly avoids both buying too much and the frustration of running out on the final coat.
Paint Coverage
Gallons = area x coats / coverage per gallon
Gallons = area x coats / coverage per gallon Each coat covers the whole area, so multiply the surface by the number of coats before dividing by the per-gallon coverage. Rounding up gives gallons to buy.
Estimating paint honestly avoids both buying too much and the frustration of running out on the final coat.
This calculator takes 3 inputs: Area to paint, Number of coats, Coverage per gallon. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.