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A 10×10 ft room has 40 ft perimeter and 320 sq ft of gross wall area at 8 ft ceilings. With one door and one window, plan about 2 gallons for two coats on walls. Adjust coats and coverage below.

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Frequently asked questions

How much paint for a 10×10 room?
About 2 gallons for walls with 8 ft ceilings, one door, one window, and two coats at 350 sq ft/gal. Paintable wall area is roughly 284 sq ft after openings.
How much paint for a 10×10 room with ceiling?
Walls: ~2 gallons. Ceiling adds 100 sq ft; two coats at 350 sq ft/gal ≈ 0.6 gal — plan 3 gallons total if painting walls and ceiling together.
How many gallons of paint for a room?
Paintable wall area = perimeter × height minus doors (~21 ft² each) and windows (~15 ft² each). Gallons = area × coats ÷ coverage (default 350 ft²/gal), rounded up.
How many coats should I plan for?
Two coats is standard for walls. One coat may suffice over similar color; new color or bare drywall often needs two. Adjust the coats field in the calculator.