Paint Calculator

Calculate how many gallons of paint are needed to cover any room's walls and ceiling. Automatically subtracts door and window areas and accounts for multiple coats.

Room Length (ft)

Room Width (ft)

Ceiling Height (ft)

Number of Doors

Number of Windows

Number of Coats

Coverage per Gallon (sq ft/gal)

Include Ceiling?

Results

Total Wall Area (sq ft)

16812.00

Ceiling Area (sq ft)

120.00

Gallons Needed

48.03

Gallons Rounded Up (ceiling)

0.34

Quarts

192.14

\text{Gallons} = \frac{2H(L+W) - 21D - 15W_n}{C} \times \text{coats}