Planning a retaining wall just got easier with the Sunset Sleepers Retaining Wall Calculator. Simply choose the style of concrete sleepers you want and enter your wall’s length and height, and our tool will automatically estimate how many concrete sleepers and steel posts you'll need—no guesswork, no stress.
How to use this Calculator?
Single Height Walls:
Each section you enter represents one wall. If your project includes turns (like L-shapes or U-shapes), treat each section as a separate wall. The calculator will automatically include two C-posts per turn.
Varying Wall Heights:
No problem—just break it down into separate wall sections by height. For example:
- Wall 1: 400mm high — use an 800mm C-post
- Wall 2: 600mm high — use a 1200mm C-post
Want to connect the two walls in a straight line instead? You can swap the two C-posts for one 1200mm H-post.
Custom Sizes:
Our calculator works with various wall heights and sleeper sizes. But for added peace of mind, we recommend confirming the estimate with a qualified landscaper or engineer—or feel free to speak with our team.
Step 2 — Enter your retaining wall details
Start by entering your walls length and height (in meters) as well as the sleeper length you’re after. Leave Post Depth default at 1x if you’re unsure. You can also enter in multiple walls as you go along.