Paint Coverage Calculator
Estimate how many gallons of paint you need for your room.
Paint Math
One gallon of paint typically covers 350 to 400 square feet. This calculator makes the math easy by automatically subtracting standard openings.
- Doors: Assumes a standard door is 21 sq ft.
- Windows: Assumes a standard window is 15 sq ft.
Pro Tip: We always recommend applying 2 coats for the best finish and true color. If you are doing two coats, simply double the "Gallons Needed" result above!