Paint for a 8×11 room

1.4 gallons (buy 1 gal + 2 qt)

for two coats on 253 sq ft of wall: 8 ft ceilings, one door, two windows, 350 sq ft per gallon.

Paint for a 8×11 room by ceiling height

Ceiling heightWall area1 coat2 coats
8 ft253 sq ft0.7 gal1.4 gal
9 ft291 sq ft0.8 gal1.7 gal
10 ft329 sq ft0.9 gal1.9 gal
12 ft405 sq ft1.2 gal2.3 gal

Wall area subtracts one door (21 sq ft) and two windows (15 sq ft each). Ceiling: 88 sq ft, 0.25 gal per coat.

How it’s worked out

  1. Perimeter: 2 × (11 + 8) = 38 ft.
  2. Wall area: 38 × 8 ft = 304 sq ft, minus 21 for the door and 30 for the windows = 253 sq ft.
  3. Two coats: 253 × 2 ÷ 350 = 1.45 gallons.

Change the numbers

Wall paint needed

1.4 gallons

Buy 1 gallon + 2 quarts for 253 sq ft of wall, 2 coats.

Wall area (less doors and windows)253 sq ft
Wall paint1.45 gal: buy 1 gallon + 2 quarts
Ceiling paint, 1 coat0.25 gal: buy 2 quarts
Primer, 1 coat0.72 gal

Other room sizes

Questions

How much paint do I need for a 8×11 room?
About 1.4 gallons for two coats on the walls of a 8×11 room with 8 ft ceilings, one door and two windows: buy 1 gal + 2 qt. The ceiling takes another 0.3 gallons per coat.
How many square feet of wall is a 8×11 room?
304 sq ft of wall with 8 ft ceilings, or about 253 sq ft after one door and two windows.
How much does it cost to paint a 8×11 room?
Paint for the walls costs about $80 at $40 a gallon. Professional painters typically charge $2 to $6 per square foot of floor area, about $176 to $528 here.

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