How much paint do you need?
- Calculate gallons
- Estimate square feet
- Determine paintable wall area
- Paint calculator square feet
- Painting estimate calculator
- Calculate paint needed
Paint Calculator
- Determine how much paint you need
- Determine the paintable surface
- How many gallons
- Wall paint calculator
- Subtract the windows and doors
- Calculate gallons of paint needed
Paint Calculator Tool
Determine how many gallons of paint you need.
Are you wondering how many gallons of paint you need?
Determine the square footage of the room by entering the width of each wall and the height of the room you want to paint. Enter the number of doors and windows in the room to provide a more accurate estimate of the number of gallons required to paint the room.
The paint calculator uses the following assumptions when determining the number of gallons of paint:
- One gallon of paint will cover 350 square feet
- Coverage is limited to one coat of paint
- Standard window size of 3 x 5
- Standard door size of 3 x 7
When estimating the number of gallons required to paint your room, consider that unfinished walls will absorb more paint and will require additional coats. Also, changing from a darker color to a lighter color will likely require a second coat of paint as well.
Paint calculator
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Learn more about using the Paint Calculator here.
Free tool takes away the guess work when determining how much paint you need to paint a room.