🎨 Paint Calculator

Calculate wall paint quantity including coats and waste

Enter Room Dimensions

Standard: 35 sqm per 5L

💡 Tips

  • • Calculates total area of four walls
  • • Does not deduct doors/windows — actual usage may be slightly less
  • • Add 10-20% for rough walls
  • • Dark colors may need 3+ coats

How It Works

Formula

Wall Area = 2 x (Length + Width) x Height
Total Paint Area = Wall Area x Number of Coats
Paint Needed = Total Paint Area / Coverage Rate per Coat

Best For

  • Regular rectangular rooms
  • Latex paint and water-based paints
  • Standard application conditions

Common Mistakes

  • Forgetting coat count: primer + topcoat usually requires 2-3 coats
  • Ignoring wall condition: rough walls absorb more paint
  • Not accounting for waste: application process adds 5-10% waste

Measuring Tips

  • Use a laser distance measurer for accuracy
  • Measure multiple times and take the average
  • Record door and window sizes to deduct later
  • Measure irregular walls in sections and add up

Related Content

How Much Area Can One Bucket Cover?

Learn about theoretical and actual paint coverage

🔲 Tile Calculator

Calculate tile quantity and laying waste

Disclaimer: Results are estimates only. Actual quantities depend on wall condition, application method, and product brand. We recommend purchasing 10-15% extra and consulting a professional.