Coverage Area Calculator | Free Construction Calculators

Calculate how much area a specific amount of paint will cover.

gallons

Paint Coverage Rates

Standard coverage per gallon (one coat on smooth surfaces):

  • Flat/Matte: 350-400 sq ft per gallon
  • Eggshell/Satin: 350-400 sq ft per gallon
  • Semi-Gloss: 300-350 sq ft per gallon
  • High-Gloss: 300-350 sq ft per gallon
  • Exterior: 300-400 sq ft per gallon
  • Ceiling: 350-400 sq ft per gallon

Coverage Can Vary Based On

  • Surface Texture: Rough = less coverage, smooth = more coverage
  • Porosity: Porous surfaces absorb more paint
  • Color: Hiding dark colors reduces effective coverage
  • Application: Brush uses less than roller, spray uses most
  • Paint Quality: Higher quality often covers better

Surface Type Coverage

Smooth Surfaces (Better Coverage)

  • Previously painted walls
  • Smooth drywall
  • Wood with primer
  • Metal surfaces

Rough Surfaces (Less Coverage)

  • Textured walls
  • Stucco
  • Brick/concrete block
  • Unpainted wood

Paint Can Sizes

  • Sample: 8 oz (covers ~25 sq ft)
  • Quart: 32 oz (covers ~100 sq ft)
  • Gallon: 128 oz (covers ~350-400 sq ft)
  • 5-Gallon Bucket: 640 oz (covers ~1,750-2,000 sq ft)

Coverage Tips

  • Always prime unpainted surfaces for better coverage
  • Use paint with primer for better one-coat coverage
  • Apply thin, even coats rather than thick coats
  • Allow proper drying time between coats
  • Buy extra for touch-ups and future repairs

When You'll Need More Paint

  • Painting over dark colors with light colors
  • First time painting new drywall
  • Very porous or textured surfaces
  • Using lower quality paint
  • Spray application method