This retaining wall block reference table shows the blocks needed for a range of wall length values, assuming a wall height of 1 m and a face area per block of 0.1 m². Every figure is computed with the same engine that powers our Retaining Wall Block Calculator, so the numbers are exact.
| Wall length | Blocks needed | Wall face area |
|---|---|---|
| 2.5 m | 25 | 2.50 |
| 5 m | 50 | 5.00 |
| 7.5 m | 75 | 7.50 |
| 10 m | 100 | 10.00 |
| 15 m | 150 | 15.00 |
| 20 m | 200 | 20.00 |
| 30 m | 300 | 30.00 |
| 50 m | 500 | 50.00 |
| 70 m | 700 | 70.00 |
| 100 m | 1,000 | 100.00 |
How to use this table
Find the row closest to your wall length and read across to the blocks needed. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Retaining Wall Block Calculator for a precise answer.
Need a value that is not in the table? — the Retaining Wall Block Calculator does it instantly, for free, with the formula and a worked example built in.
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