Retaining Wall Calculator with Cost
Add your unit price to see the full material cost, not just the count, for your retaining wall project.
Runs locally in your browser — your measurements never leave this pageTry: Length=10, Height=3, Waste=5, Price per block=3.5, Units=ft → 30.00 ft², 5%, 53 blocks, $185.50
How to use
A typical 16×6 inch retaining block covers about 0.6 ft² of face including the joint. Enter the wall length and height and the calculator returns the blocks needed, plus 5% for cuts.
FAQ
Does this include cap blocks?
No — add one cap block per linear foot of wall top separately.
What waste for a curved wall?
Curves need more cutting; budget 8–10% instead of 5%.
How deep should the base be?
Usually a compacted gravel base 4–6 inches deep below the first course; that is not counted here.
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