Paint Calculator

Estimate gallons of paint needed for a room or a single wall, then see instantly whether quart cans, gallon cans, or 5-gallon buckets are the cheapest way to buy it.

Paint Calculator

Room Length (ft)

Room Width (ft)

Wall Height (ft)

Doors

Windows

Paint Preview

Hover for area • all 4 walls shown as one strip

Coats

Coverage (sq ft/gal)

Waste Factor (%)

Pricing (edit to match local rates)

Quart Can ($)

Gallon Can ($)

5-Gallon Bucket ($)

Paint Needed

1.99 gal

697 sq ft · 2 coats (incl. 10% waste)

Recommended Buy

Gallon Cans

2 gallons · $64.00

Purchase Option	Quantity	Est. Cost
Quart Cans	8 quarts	$96.00
Gallon CansBest value	2 gallons	$64.00
5-Gallon Buckets	1 buckets	$110.00

Cheapest option: Gallon Cans at $64.00For small areas or accent walls, quart or gallon cans cut down on leftover paint. For a whole room, 5-gallon buckets are almost always the lowest cost per gallon.

Don't skip the second coatA single coat rarely gives even coverage, especially over a color change or dark-to-light repaint. Budget for at least two coats — and add a coat of primer first if you're painting bare drywall or switching from a dark to a light color.

This is a material estimate only. Actual coverage varies by paint brand, surface texture, and color change — check the coverage rate on your product label and always round up.