Paint Calculator
Calculate how much paint you need for a room based on dimensions, doors, windows and coats.
How to Use This Paint Calculator
- 1Enter room length, width and height
- 2Enter number of doors and windows
- 3Select number of coats
- 4Click Calculate
Formula
Paintable Area = (2×(L+W)×H) - (Doors×21sqft) - (Windows×15sqft). Gallons = Area × Coats / 350
Frequently Asked Questions
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About Paint Calculator
Estimate how much paint you need for your room based on dimensions, doors, windows and number of coats. Get gallons needed and estimated cost.