Paint Quantity Calculator | Free Construction Calculators

Calculate how much paint you need for your project.

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Paint Coverage Guidelines

Standard coverage rates per gallon (one coat):

  • Flat/Matte: 400 sq ft per gallon
  • Eggshell/Satin: 400 sq ft per gallon
  • Semi-Gloss: 350 sq ft per gallon
  • High-Gloss: 350 sq ft per gallon
  • Exterior Paint: 350 sq ft per gallon
  • Ceiling Paint: 400 sq ft per gallon

Number of Coats

  • 1 Coat: Only for touch-ups or same color refresh
  • 2 Coats: Recommended for most projects
  • 3 Coats: Dramatic color changes or covering dark colors

Factors Affecting Coverage

  • Surface Texture: Rough surfaces absorb more paint
  • Color Change: Light to dark or vice versa may need more coats
  • Paint Quality: Premium paints often have better coverage
  • Application Method: Brush, roller, or sprayer affects usage
  • Surface Condition: New drywall absorbs more than previously painted walls

Waste Factor Guidelines

  • 10%: Standard waste factor for most projects
  • 15-20%: Complex rooms with many corners or textures
  • 25-30%: Spray application or very textured surfaces

Important Tips

  • Always buy from the same batch to ensure color consistency
  • Consider buying an extra quart for future touch-ups
  • Read manufacturer specifications for specific coverage rates
  • Prime bare surfaces for best coverage and adhesion
  • Test color with a small sample before purchasing full amount