How do I calculate paint for a room?
Wall area = 2 × ceiling height × (length + width). Add ceiling area (length × width) if you are painting the ceiling. Divide total coverage by sq ft per gallon on your paint can.
Room Paint Calculator
Measure a rectangular room in feet and inches. We calculate wall area from perimeter × height, add ceiling if needed, and deduct doors and windows.
Rooms
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Project settings
Default 10% for touch-ups
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Frequently asked questions
How many coats should I plan for?
Most interior walls need two coats over primer or a color change. Primer alone is often one coat. Adjust the coat count in project settings.
Should I subtract doors and windows?
Yes for a closer estimate. A standard door is about 20 sq ft and a window about 15 sq ft. The calculator deducts these automatically.
Paint Calculator · https://paint-calculator.ca