How much paint for a 9×10 room with 10' ceilings?
Answer
2 gallons (2 coats)
Total wall area: 380 sq ftPaintable area (after openings): 323 sq ftCoverage needed (2 coats): 646 sq ft
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How We Calculated This
Gallons = (Paintable Wall Area × Coats) / 350 sq ft per gallon
Walls: 2 × (10 + 9) × 10 = 380 sq ft. After 15% openings: 323 sq ft. × 2 coats = 646 sq ft ÷ 350 = 2 gallons
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Calculated using verified formulas. Last updated March 2026.