How much paint do I need?

Measure wall area, subtract doors and windows, multiply by coats and divide by paint coverage.

How much area does one gallon cover?

Most paints cover approximately 350 square feet per gallon.

Paint Estimator Calculator | Estimate Paint, Cost & Coverage

Paint Estimator Calculator

Estimate paint quantity, gallons required and project cost.

Calculator

Room Length (ft) Room Width (ft) Room Height (ft) Doors Windows Paint Coats Coverage (sq ft/gallon) Paint Price per Gallon ($) Waste (%)

Results

Wall Area	-
Ceiling Area	-
Total Paint Area	-
Gallons Needed	-
Estimated Cost	-

How the Calculator Works

This calculator estimates wall and ceiling area, subtracts standard-sized doors (21 sq ft each) and windows (15 sq ft each), applies a waste factor, and divides by the selected paint coverage to estimate the number of gallons required.

Frequently Asked Questions

How many coats should I use?

Two coats are commonly recommended for most interior painting projects.

Does this include ceilings?

Yes. The ceiling area is included in the estimate.