Paint Needed
Estimate how many gallons of paint a room needs from its length, width, height and number of coats. It totals the four wall areas and divides by a typical 350 sq ft per gallon of coverage. Results update instantly and stay on your device.
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Worked example
Wall area: 432 ft² · Gallons: 2.468571
Inputs
- Length ft
12 - Width ft
12 - Height ft
9 - Coats
2
Frequently asked
How much area does a gallon cover?
This tool assumes about 350 square feet per gallon, a common figure for one coat on primed drywall.
Does it account for doors and windows?
No — it estimates full wall area, so the result is a slight over-buy that covers touch-ups and waste.