Home › Rooms › 18×20 garage

How much paint for a 18x20 garage?

A 18x20 garage has about 572 sq ft of paintable wall. For two coats, plan on roughly 3.3 gallons.

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

For 2 coats, 8 ft ceiling

3.3 gallons (~4 cans)

Adjust for your garage

🖌️ Paint calculator

UnitsSurface

Length (ft)Width (ft)

Wall height (ft)Coats

DoorsWindows

Pick a durable, washable finish suited to a garage.

How much paint for a 18x20 garage?: About 3.3 gallons for two coats. Measure the big garage door separately — it is usually a different paint.