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.

How Much Paint for a 10x10 Room?

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. Most 10×10 bedrooms need about 2 gallons for two coats on walls alone. Exact math for walls-only and walls-plus-ceiling below.

Last updated: June 30, 2026

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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.

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

Enter 10 ft × 10 ft dimensions, your ceiling height, and opening counts in our free single-room paint calculator for an instant gallon total.

Frequently asked questions

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.

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