Measurement calculator
Wall Square Footage Calculator
Calculate the square footage of walls from perimeter and height, with an allowance for openings.
Your measurements
Estimated result
Gross wall area0 sq ft
Net wall area0 sq ft
Planning estimate only. Check product specifications, site conditions and local codes before ordering or building.
Wall square footage formula
Gross wall area = room perimeter × wall height. Net wall area = gross wall area − doors and windows.
Planning notes
This page targets wall surface area, not floor area. Use the net result for paint, drywall or wall-covering estimates when openings should be excluded.
- Measure the full room perimeter for all walls.
- Subtract doors and windows only when you need net finish area.
Keep calculating
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