Gallons per Square Foot Calculator
Calculate gallons needed per square foot for painting or coating projects.
Results
Gallons per Sq Ft0.0025
Coverage per Gallon400.0 sq ft
Total Needed (1 coat)1.00 gal
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Frequently Asked Questions
How many square feet does a gallon of paint cover?
One gallon of paint typically covers 350-400 sq ft for one coat. Darker colors and rougher surfaces may need more.
How many gallons for a 12x12 room?
A 12x12 room with 8 ft ceilings has about 384 sq ft of wall area. At 350 sq ft per gallon: 1.1 gallons per coat — buy 2 gallons.
Does primer count as a coat?
Primer covers differently than paint — about 300-350 sq ft per gallon. Always prime new drywall or bare wood before painting.