How much paint do you need for 300 square feet?

Painting 300 square feet of wall takes 1 gallon for one coat or 2 gallons for two coats, at a typical 350 sq ft per gallon.

Change the numbers

The calculator below is pre-filled for this project. Adjust any value — including feet and inches — and the results update instantly.

sq ft
sq ft

Check the can; 350–400 is typical.

Add prices to estimate cost (optional)
$

Enter today’s prices from your store or supplier; we never guess prices for you.

Your results

Wall paint to buy2 gallons
Paintable wall area300 sq ft
Exact wall paint (2 coats)1.71 gal
Primer, if needed (1 coat)1 gallon
How much paint do you need for 300 square feet — diagram

Paint for 300 sq ft by coverage

Use 400 for smooth, previously painted walls and 250 for texture, bare drywall or masonry.

Coverage1 coat2 coats
400 sq ft/gal1 gallon1 gallon + 2 quarts
350 sq ft/gal1 gallon2 gallons
300 sq ft/gal1 gallon2 gallons
250 sq ft/gal1 gallon + 1 quart2 gallons + 2 quarts

Single gallons and quarts are the right size for this job. Measure wall area as wall width × height, minus doors (about 21 sq ft) and windows (about 15 sq ft).

The math

300 sq ft × 2 coats ÷ 350 = 1.71 gallons

Common questions

How many gallons of paint for 300 square feet?

1 gallon for one coat, 2 gallons for two coats at 350 sq ft per gallon.

Want the full method, tips and other sizes? See the paint calculator guide.

Last reviewed November 1, 2026. Results are estimates — confirm with your supplier.

Similar sizes

100 sq ft200 sq ft400 sq ft500 sq ft750 sq ft1,000 sq ft

Related calculators

Drywall CalculatorSheets of 4×8, 4×10 or 4×12 drywall plus screws for any room.Square Footage CalculatorArea of rectangles, triangles and circles in sq ft, sq yd, m² and acres.Flooring CalculatorSquare feet and boxes of laminate, vinyl plank or hardwood with waste.