Free Tool
Paint Coverage Calculator
Enter the area you're painting and the number of coats to get the gallons needed, rounded to a practical amount to actually buy.
Gallons needed (exact)
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What to buy
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350 sq ft per gallon is a common default for a smooth wall with one coat, but coverage varies by paint brand, surface texture, and color change - check the can for the actual rate when you have it. This doesn't account for primer, trim, or doors/windows as separate line items.
This math, built into every bid
Punchlist's reusable cost catalog keeps material quantities and pricing consistent across every paint job, not re-guessed each time.