Wall Area Table: Net wall area by Wall length
Reference table of net wall area for Wall Area across a range of wall length values — exact, engine-computed figures you can read off at a glance.
Wall Area Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Net wall area
13.00
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Wall Area Calculator
The Wall Area Calculator works out your net wall area in an instant. Enter wall length, wall height and openings area (doors/windows) and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the wall length.
- Enter the wall height.
- Enter the openings area (doors/windows).
- Read off your net wall area — the calculator updates automatically, with no button to press.
Formula
The Wall Area Calculator uses the formula:
Net wall area = Wall length × Wall height - Openings area (doors ÷ windows)
Worked example
For example, with wall length of 5 m, wall height of 3 m and openings area (doors/windows) of 2 m², the net wall area is 13.00.
| Wall length | 5 m |
|---|---|
| Wall height | 3 m |
| Openings area (doors/windows) | 2 m² |
| Net wall area | 13.00 |
|---|
Results are estimates for educational use, not professional advice.
Key terms explained
- Area
- The amount of two-dimensional space a shape covers, measured in square units.
Frequently asked questions
Multiply length by height, then subtract openings. A 5 by 3 m wall with 2 m² of openings is 13 m².
Doors and windows are not painted or tiled, so removing them avoids over-ordering materials.
Multiply each door's and window's width by height, then add them together.
It sizes paint, plaster, tiles and wallpaper accurately for the surface that is actually covered.
Enter the wall length. Enter the wall height. Enter the openings area (doors/windows). Read off your net wall area — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Wall Area: Formula, Steps & Examples
Learn how to calculate Wall Area — the formula explained step by step, with worked examples and a free calculator to check your answer.