How Much Paint for a 10x10 Room? (~2 Gallons)
Quick answer: buy about 2 gallons for two coats on walls in a standard 10×10 bedroom (8 ft ceilings, one door, one window). A 10×10 foot room has a 40 ft perimeter; with standard 8 ft ceilings that is 320 sq ft of gross wall area before you deduct doors and windows. Exact math for walls-only and walls-plus-ceiling below.
Reviewed against methodology · Last updated: July 13, 2026
Use the 10×10 Room Paint Calculator →Steps
- Find gross wall area — Perimeter 10 + 10 + 10 + 10 = 40 ft. Multiply by ceiling height: 40 × 8 = 320 sq ft of walls.
- Subtract openings — Standard door ≈ 21 sq ft; small window ≈ 15 sq ft. One of each → 320 − 36 = 284 sq ft paintable.
- Apply coats and coverage — Two coats at 350 sq ft/gal: 284 × 2 ÷ 350 ≈ 1.62 gal → buy 2 gallons. Add ceiling separately if needed.
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Gallons by coat count (walls only)
Assumes 284 sq ft paintable walls (one door, one window), 350 sq ft/gal coverage, walls only.
1 coat
284 ÷ 350 ≈ 0.8 gal — round up to 1 gallon for a single coat.
2 coats (recommended)
284 × 2 ÷ 350 ≈ 1.62 gal — buy 2 gallons so batch and sheen match.
3 coats (deep color change)
284 × 3 ÷ 350 ≈ 2.4 gal — buy 3 gallons for primer plus two finish coats.
Walls + ceiling (2 coats each)
Walls ~2 gal + ceiling 100 sq ft × 2 coats ÷ 350 ≈ 0.6 gal — plan 3 gallons total.
Wall area for a 10×10 room
A square 10×10 ft room has perimeter 40 ft. Multiply by ceiling height for gross wall area: 40 × 8 = 320 sq ft (adjust if your ceilings are 9 or 10 ft).
This is the starting number before subtracting doors, windows, or built-ins you will not paint.
Door and window deductions
Standard interior door opening: about 21 sq ft (3 ft × 7 ft). Small window: about 15 sq ft.
Example with one door and one window: 320 − 21 − 15 = 284 sq ft of paintable wall surface.
10×10 room, two-coat example
284 sq ft paintable × 2 coats = 568 sq ft total coverage needed. At 350 sq ft/gal: 568 ÷ 350 ≈ 1.62 gallons → buy 2 gallons so batch and sheen match.
Ceiling paint (optional)
Flat ceiling area = 10 × 10 = 100 sq ft. Two coats at 350 sq ft/gal: 200 ÷ 350 ≈ 0.57 gal, round up to 1 quart or include in a third gallon if buying for the whole room.
Textured or unprimed ceilings may drop effective coverage to 250–300 sq ft/gal, buy slightly more if your ceiling is heavily textured.
Verify with the calculator
Open our 10×10 room paint calculator — preset perimeter, doors, and windows — for an instant gallon total. Adjust ceiling height or coat count if your room differs.
Frequently asked questions
- How much paint do I need for a 10x10 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 is needed for a 10x10 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 10x10 room with ceiling?
- Walls: ~2 gallons as above. Ceiling adds 100 sq ft (10 × 10); two coats at 350 sq ft/gal ≈ 0.6 gal, plan 1 gallon total if painting walls and ceiling together (3 gallons combined).
- Is one gallon enough for a 10x10 room?
- Rarely for two coats on all four walls. One gallon covers ~350 sq ft per coat, your paintable walls are ~284 sq ft, so one coat needs ~1 gallon and a second coat needs another.
- How do I estimate paint for other room sizes?
- Use the same perimeter × height formula with your exact dimensions. For general room sizing (12×12, open plans, multi-room jobs), see our How Much Paint for a Room guide.