Retaining Wall Block Table: Blocks needed by Wall length
Reference table of blocks needed for Retaining Wall Block across a range of wall length values — exact, engine-computed figures you can read off at a glance.
Retaining Wall Block Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Blocks needed
100
- Wall face area
- 10.00
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Retaining Wall Block Calculator
The Retaining Wall Block Calculator works out your blocks needed, along with 1 related figure in an instant. Enter wall length, wall height and face area per block 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 face area per block.
- Read off your blocks needed, together with wall face area — the calculator updates automatically, with no button to press.
Worked example
For example, with wall length of 10 m, wall height of 1 m and face area per block of 0.1 m², the blocks needed is 100.
| Wall length | 10 m |
|---|---|
| Wall height | 1 m |
| Face area per block | 0.1 m² |
| Blocks needed | 100 |
|---|---|
| Wall face area | 10.00 |
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
Divide the wall face area by the face area of one block, then round up. A 10 m by 1 m wall with 0.1 m² blocks needs 100 blocks.
Multiply the block's exposed width by its height. A 0.4 by 0.2 m block has a face area of 0.08 m².
Yes. Add a few percent for cuts, breakage and the buried base course.
Most retaining walls start with a buried, levelled base course for stability; include it in the height when counting.
Enter the wall length. Enter the wall height. Enter the face area per block. Read off your blocks needed, together with wall face area — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Retaining Wall Block: Formula, Steps & Examples
Learn how to calculate Retaining Wall Block — the formula explained step by step, with worked examples and a free calculator to check your answer.