MulticalcPaint Coverage Calculator
Calculate how much paint you need for your projectEnter dimensions to calculate paint coverage.
Paint Calculator Guide
How to Calculate Paint Coverage
1. Measure Your Surface
Measure the length and height (or width) of the surface you're painting. For rooms, measure all walls.
2. Account for Doors & Windows
Standard door: 21 sq ft (3ft × 7ft)
Standard
window: 15 sq ft (3ft × 5ft)
3. Consider Number of Coats
Most projects need 2 coats. Primer or color changes may require more.
4. Check Coverage Rate
Standard paint: 350-400 sq ft per gallon
Primer:
200-300 sq ft per gallon
Textured surfaces: 250-300 sq ft per gallon
Paint Types & Coverage
- Flat/Matte: 350-400 sq ft/gallon
- Eggshell/Satin: 350-400 sq ft/gallon
- Semi-Gloss: 350-400 sq ft/gallon
- High-Gloss: 300-350 sq ft/gallon
Pro Tips
-
Buy
Extra
Purchase 10-15% more paint than calculated for touch-ups and future repairs. -
Primer First
Use primer on new drywall or when making dramatic color changes. -
Quality Matters
Higher quality paint often covers better, potentially saving you a coat.
Common Room Sizes
- Small Room: 10×10×8 ft = ~1.5 gallons
- Medium Room: 12×15×8 ft = ~2 gallons
- Large Room: 15×20×9 ft = ~3 gallons
Paint Calculator
Calculate exactly how much paint you need for your project. Save money by avoiding over-purchasing and ensure you have enough to complete the job!
Standard Sizes
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Did You Know?
The color you choose affects coverage! Darker colors often require more coats than lighter ones, especially when painting over a different color.