PAINT CALCULATOR
How much paint for a 20 × 24 room?
Quick answer: 4 gallons + 1 quart covers a 20 × 24-ft room with 10-ft ceilings, 2 door, and 4 windows for two coats of premium paint. Net wall area: 778 sq ft.
Typical use cases for this size: large great room, basement, finished attic. Adjust the inputs below for your exact room.
HERE'S HOW MUCH YOU'LL NEED
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ESTIMATED COST BY BRAND
Prices marked ~ are tier midpoints (brand tints at dealer). Sorted cheapest first.
FOR THIS SIZE
A 20 × 24 room is typical for
Large great room, basement, finished attic. The math works out to roughly 4 gallons + 1 quart for two coats of a quality interior paint with 10-ft ceilings.
Cost estimate
At ~$40–55/gallon for premium paint, this room runs $40–110 in paint alone for a DIY project. Add $30–50 in supplies (rollers, tape, drop cloth) and you're looking at $70–160 in materials for a typical 20 × 24 repaint.
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