Wall Area Calculator

Calculate wall surface area for painting, drywall, or paneling projects. Subtract doors and windows for more accurate material estimates. If measuring ceilings, try our Ceiling Area Calculator.

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Paint Coverage Floor Area Square Footage Room Area
Wall Area: —
Formula:
Wall Area = Length × Height × Number of Walls
Adjusted Area = Wall Area − Subtractions
Example:
20 ft × 8 ft × 4 walls = 640 ft²
Minus 40 ft² (doors/windows) → 600 ft²
Related Calculators:
Paint Coverage Floor Area Room Area Square Footage

Frequently Asked Questions

Should I subtract doors and windows?

Yes. Subtracting doors and windows improves paint and drywall estimates.

What unit is the result shown in?

The primary result is displayed in square feet (ft²).

Can this calculate an entire room?

Yes. Enter total walls and subtract openings if needed.