Spray Paint Calculator

Calculate how many cans of spray paint you need for a project.

Spray Cans
cans
Rounded up.

Usage Tip

Keep the can about 10 inches away and moving; spraying too close or pausing causes drips and an uneven finish.

THE MATH
cans = round up( area × coats ÷ coverage per can )
Spray paint covers a small area per can, so the can count is the area times the coats divided by the coverage on the label.
Enter the area to cover, the coverage per can, and the number of coats.
Light, even passes give better coverage than one heavy coat.
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.