Free Landscape Retaining Wall Calculator
Estimate the number of retaining wall blocks needed for a landscape wall of given length and height.
ft
ft
in
in
Blocks Needed
270
Number of Rows9
Wall Face Area90 sq ft
Blocks Needed vs Wall Length
Retaining Wall Block Count
Blocks per Row = Wall Length / Block Length
Rows = Wall Height / Block Height
Total Blocks = Blocks per Row x Rows
Add 5 to 10 percent for cuts and waste. Walls taller than 4 feet typically require engineering and may need geogrid reinforcement.
Example Calculation
30 ft wall, 3 ft tall, using 12 x 4 inch blocks.
- 01Blocks per row = ceil(360 / 12) = 30
- 02Rows = ceil(36 / 4) = 9
- 03Total = 30 x 9 = 270 blocks
- 04Add 10% waste = 297 blocks, order 300.
Frequently Asked Questions
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