Wall Area Calculator

Summary

Calculate net wall area for painting or tiling by entering room dimensions and subtracting doors and windows.

How it works

1. Enter the room dimensions: length, width, and ceiling height.
2. The tool computes the total perimeter wall area (2 × (length + width) × height).
3. Add any doors and windows by specifying their width and height.
4. Each opening is subtracted from the total wall area.
5. The net area is displayed instantly, along with a breakdown of deductions.

Use cases

• Estimating how much paint or primer to purchase for a room.
• Calculating the number of tiles needed to cover bathroom or kitchen walls.
• Planning wallpaper quantities before ordering rolls.
• Generating material takeoffs for construction or renovation bids.
• Comparing painting cost estimates between rooms of different sizes.
• Accounting for multiple doors and windows in an open-plan space.

Frequently Asked Questions