Estimate wall area, paint quantity and project cost with coat, door and window deductions.
Enter your measurements
Use consistent units and check product packaging before purchasing.
How to use this tool
- Choose feet or metres.
- Enter room length, width and wall height.
- Add the number of doors, windows and coats.
- Enter coverage and price to estimate quantity and cost.
Frequently asked questions
How accurate is the paint estimate?
It is a planning estimate based on wall area and the coverage value you enter. Surface condition, paint quality and application can change actual usage.
Does it subtract doors and windows?
Yes. The calculator subtracts a standard area for each door and window before calculating paint quantity.
Why calculate two coats?
Two coats usually improve coverage, durability and color consistency, especially when changing colors.
Does the result include the ceiling?
No. This version estimates walls only, so calculate ceiling paint separately if needed.