Paint for a 12 × 12 Room
A 12 × 12 ft room with 8 ft ceilings needs about 2 gallons (≈ 7.57 litres) of paint for 2 coats — covering about 348 sq ft (32.33 m²) of wall after a door and window.
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Pre-filled for a 12 × 12 ft room — change the size, openings, coats, or switch to metric.
Enter length, width & ceiling height
Assumes ~21 sq ft per door and ~15 sq ft per window. Adjust counts to match your room.
Estimate only. These figures help you plan how much to buy — they are not engineering or structural advice. Actual needs vary with site conditions, waste, and installation method, so order a little extra and confirm final quantities with your supplier or contractor before you buy or start the job.
Other room sizes
Frequently asked questions
How much paint do I need for a 12x12 room?
A 12 × 12 ft room with 8 ft ceilings has about 348 sq ft of paintable wall after subtracting a door and a window. For 2 coats at 350 sq ft per gallon, that's about 2 gallons (≈ 7.57 litres).
How many gallons of paint for a 12x12 room with two coats?
About 2 gallons. Buy in gallons rather than quarts — they're much cheaper per square foot — and keep a little extra for touch-ups.
Do I need primer for a 12x12 room?
Prime bare drywall, patched spots, and big color changes. Count primer as an extra coat at similar coverage — roughly another 2 gallons for full coverage.
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