Paint for a 8×24 room

2.6 gallons (buy 3 gal)

for two coats on 461 sq ft of wall: 8 ft ceilings, one door, two windows, 350 sq ft per gallon.

Paint for a 8×24 room by ceiling height

Ceiling heightWall area1 coat2 coats
8 ft461 sq ft1.3 gal2.6 gal
9 ft525 sq ft1.5 gal3 gal
10 ft589 sq ft1.7 gal3.4 gal
12 ft717 sq ft2 gal4.1 gal

Wall area subtracts one door (21 sq ft) and two windows (15 sq ft each). Ceiling: 192 sq ft, 0.55 gal per coat.

How it’s worked out

  1. Perimeter: 2 × (24 + 8) = 64 ft.
  2. Wall area: 64 × 8 ft = 512 sq ft, minus 21 for the door and 30 for the windows = 461 sq ft.
  3. Two coats: 461 × 2 ÷ 350 = 2.63 gallons.

Change the numbers

Wall paint needed

2.6 gallons

Buy 3 gallons for 461 sq ft of wall, 2 coats.

Wall area (less doors and windows)461 sq ft
Wall paint2.63 gal: buy 3 gallons
Ceiling paint, 1 coat0.55 gal: buy 1 gallon
Primer, 1 coat1.32 gal

Other room sizes

Questions

How much paint do I need for a 8×24 room?
About 2.6 gallons for two coats on the walls of a 8×24 room with 8 ft ceilings, one door and two windows: buy 3 gal. The ceiling takes another 0.5 gallons per coat.
How many square feet of wall is a 8×24 room?
512 sq ft of wall with 8 ft ceilings, or about 461 sq ft after one door and two windows.
How much does it cost to paint a 8×24 room?
Paint for the walls costs about $120 at $40 a gallon. Professional painters typically charge $2 to $6 per square foot of floor area, about $384 to $1,152 here.

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