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How much paint for a 12x20 garage?

A 12x20 garage has about 476 sq ft of paintable wall. For two coats, plan on roughly 2.7 gallons.

Measure the big garage door separately — it is usually a different paint.

For 2 coats, 8 ft ceiling

2.7 gallons (~3 cans)

Adjust for your garage

🖌️ Paint calculator

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Length (ft)Width (ft)

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Pick a durable, washable finish suited to a garage.

How much paint for a 12x20 garage?: About 2.7 gallons for two coats. Measure the big garage door separately — it is usually a different paint.