How much paint for a 12×14 room with 12' ceilings?
Answer
4 gallons (2 coats)
Total wall area: 624 sq ftPaintable area (after openings): 530 sq ftCoverage needed (2 coats): 1,061 sq ft
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How We Calculated This
Gallons = (Paintable Wall Area × Coats) / 350 sq ft per gallon
Walls: 2 × (14 + 12) × 12 = 624 sq ft. After 15% openings: 530 sq ft. × 2 coats = 1061 sq ft ÷ 350 = 4 gallons
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Calculated using verified formulas. Last updated March 2026.