Home & Property
Paint Calculator
Estimate paint gallons and cost for a room, accounting for doors, windows and coats.
Gallons to buy
2
Paintable area = wall area − doors/windows; gallons = area × coats ÷ coverage
- Paintable area
- 316 sq ft
- Exact gallons
- 1.81
- Estimated cost
- $70.00
CalculateWise provides estimates for informational purposes only and is not financial, tax, legal, lending or investment advice.
How to use the Paint Calculator
- Enter room length, width and height.
- Enter the number of doors and windows.
- Set coats, coverage and price per gallon.
How it works
Wall area is reduced by standard door and window sizes, then divided by coverage per gallon and coats.
Formula
Gallons = paintable area × coats ÷ coverage per gallon
Example
A 12×10 ft room with 8 ft ceilings, one door, one window and two coats at 350 sq ft/gallon needs about 2 gallons.
Common uses
- Room makeovers
- Rental turnovers
- Budgeting supplies