Paint for a 20 × 20 room
Short answer
A 20 × 20 ft room with an 8-ft ceiling needs about 4 gallons of paint for two coats — that's roughly 589 sq ft of wall after doors and windows.
Paint needed
4 gal
Paint cost
$120–$180
Wall area
640 sq ft
Paintable
589 sq ft
Painting a 20 × 20 room
A 20 × 20 ft room with an 8-ft ceiling has about 640 sq ft of wall. After a door and two windows that is roughly 589 sq ft to cover. At two coats and ~375 sq ft per gallon, plan on about 4 gallons. Bare drywall needs primer on top of that.
Your exact room
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Frequently asked questions
How much paint for a 20 × 20 room?
About 4 gallons for two coats on the walls of a 20 × 20 ft room with an 8-ft ceiling (roughly 589 sq ft after one door and two windows).
How much does it cost to paint a 20 × 20 room?
Paint alone runs about $120–$180 for a 20 × 20 room at two coats. Add primer, supplies, or labor on top.
Do I need one or two coats?
Two coats is standard for even color and coverage, especially over a different color. One coat can work when repainting the same color with premium paint. The calculator lets you switch coats.