Retaining Wall Block Calculator
Calculate how many retaining wall blocks you need by wall length and height
Block Type
Most common residential retaining block
Wall Dimensions
%
10% recommended
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Select a block type and enter your wall dimensions to see results
Tips & Notes
- •Walls over 4 feet tall typically require a permit and engineered batter (backward lean).
- •Add 10% extra blocks for cutting and waste.
- •Plan for drainage behind the wall: use 3/4" crushed stone and a perforated drain pipe.
- •Each course should step back slightly — most blocks are designed with a natural batter.
- •Cap blocks are typically the same length but shorter in height — order separately.
Recommended Products
Popular items for this project — links may earn a commission.
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