How Much Paint for a 16×20 Room?
A 16×20 room with standard 8 ft walls has about 576 sq ft of wall — roughly 4 gallons for two coats. Adjust ceiling height and coats below.
Paint to buy
4 gal
Wall area
576 sq ft16×20 room with 8 ft walls
Paint (2 coats)
3.3 gallonsbuy 4 gal — rounding covers doors & windows
Coverage
350 sq ft / gallonper coat, smooth interior surface
Paint cost (est.)
$160~$40/gal mid-grade
Doing this for work? Estimate the whole job in minutes.
JRIQ turns plans and site photos into full material + labor estimates with AI — built by the team behind these calculators.
Try it free →
How this is calculated
Mulch volume = bed area × depth. We convert cubic feet to cubic yards for bulk delivery and to 2-cu-ft bags for the bagged option, so you can compare cost both ways.