Retaining Wall Calculator
Estimate sleepers/blocks and concrete required for a retaining wall.
Estimate only — not a substitute for a licensed tradesperson, a certified engineer, or sign-off from your local building surveyor. Verify against current standards and site conditions before ordering materials or starting work.
building rules differ by state, territory and council. Results are estimates - confirm requirements with your local council or state building authority before you build.
Result
- Sleeper courses
- 5
- Posts required
- 7
- Sleeper lengths required
- 30
What this is based on
Quantity take-off only. Retaining wall design is governed by AS 4678 and, in most jurisdictions, requires engineering design and approval above a modest height. This calculator must not be used as a design tool.
We cite the clause and link to the publisher so you can read the source yourself. We do not reproduce the text or tables of the NCC or of any Australian Standard.