🎨 Paint Calculator
How many gallons of paint you need, by area, coverage, and coats.
Quick answer: a 400 sq ft wall area with 2 coats at 350 sq ft/gallon coverage needs about 2.3 gallons — buy 3. Enter your own room's numbers below.
Length × height of the walls, minus large doors/windows if you want to be precise.
Paint needed
Enter your wall area to see how much paint to buy.