Retaining Wall Calculator Units: US Imperial Metric (AU/EU) Wall Dimensions Wall Length (ft) ft Wall Height (ft) ft Block Specifications Block Size 16 x 6 x 10 in (Standard) 12 x 4 x 8 in 8 x 4 x 12 in Custom Size Block Length (in) in Block Height (in) in Block Depth (in) in Waste / Cut Allowance Waste Percentage 5% 10% (Recommended) 15% Advanced Components Include Base Gravel Footing (6 in deep / 12 in wide base) Include Drainage Backfill Stone (12 in wide behind wall) Calculate Reset Calculation Results — Total Rows of Blocks — Blocks per Row — Total Estimated Blocks (incl. waste allowance) — Base Gravel Required — Backfill Stone Required Note: Walls exceeding 4 feet (1.2m) generally require professional engineering expertise and may need Geogrid reinforcement or local building permits. More Tools Fence Calculator Paver Calculator Decking Calculator Related Articles How to Keep Geese Off Your Lawn How to Get Rid of Mushrooms in a Lawn (And Should You?) How to Dethatch a Lawn: Diagnose Thatch, Then Treat It How to Get Rid of Creeping Charlie in Your Lawn Was this helpful? Yes No Change my vote Inaccurate / tool error Too complex / hard to follow Didn't solve my problem Submit Thank you for your feedback!
