Paint Coverage Calculator
Calculate how much paint you need for your project based on area and paint coverage rate.
Calculator Updated: 8/21/2025
Paint Coverage Calculator
Use this calculator to determine how much paint you’ll need for your project based on the area to be painted and the coverage rate of your paint.
How to Use This Calculator
- Measure the total area to be painted in square feet or square meters
- Check the coverage rate on your paint can (typically 350-400 sq ft per gallon)
- Enter the values below to calculate the amount of paint needed
Paint Coverage Calculator
Understanding Paint Coverage
Paint coverage varies based on several factors:
- Paint type: Premium paints often cover better than budget options
- Surface texture: Rough or porous surfaces require more paint
- Color change: Drastic color changes may require additional coats
- Application method: Spraying typically uses more paint than rolling
As a general rule:
- Interior flat paint: 350-400 sq ft per gallon
- Interior semi-gloss paint: 300-350 sq ft per gallon
- Exterior paint: 250-300 sq ft per gallon
- Primer: 250-300 sq ft per gallon