Painting Calculator

Calculate paint and primer quantities for interior and exterior projects

Room Dimensions

Enter wall and ceiling areas

m²

Height × width of all walls combined

m²

Leave at 0 if not painting ceiling

Paint Specification

Specify coats and coverage

coats

1-3 typical

m²/L

Check can - typically 8-12 m²/L

m²/L

Typically 10-15 m²/L

%

Overspray and spillage - typically 10%

Results

Total Area

120m²

Paint Required

🎨26.5L

Primer Required

🪣11L

Suggested Paint Tins

Paint Tins

  • 5 × 5L tins
  • 1 × 1L tin
  • 1 × 1L tin

Primer Tins

  • 2 × 5L tins
  • 1 × 1L tin

💡 Pro Tip: Coverage varies based on surface texture and paint quality. Textured surfaces need more paint. Always test coverage on your specific surface before buying full quantities.

How to Use

  1. 1Measure all wall areas in square meters
  2. 2Include ceiling area if painting it
  3. 3Specify number of coats (usually 2)
  4. 4Check paint coverage on tin (typically 8-12 m²/L)
  5. 5Enable primer for new surfaces or dark colors
  6. 6Results account for 10% wastage by default

Example

60 m² room with 2 coats

Inputs:

Wall area: 80 m²\nCeiling: 30 m²\nCoats: 2\nCoverage: 10 m²/L\nPrimer: Yes

Results:

Paint: 22 litres\nPrimer: 9 litres\nSuggested tins: 1x5L + 3x5L

Related Guides