Planning a retaining wall? Our free online calculator helps you accurately estimate the total number of blocks, amount of paver base, and backfill gravel required. Avoid overspending or running short. Get your material list ready for a successful project!
Formula:
Formula Explanation:
This calculator estimates materials based on your wall dimensions and block specifications:
- Total Blocks:
(Wall Length ÷ (Block Length ÷ 12)) × (Wall Height ÷ (Block Height ÷ 12)) × (1 + Waste Factor) - Base Material Volume (ft³):
Wall Length × (Block Depth ÷ 12) × (Base Thickness ÷ 12) × (1 + Waste Factor) - Backfill Gravel Volume (ft³):
Wall Length × Wall Height × (Backfill Thickness ÷ 12) × (1 + Waste Factor)
Note: Formulas include a waste factor for material overage. Block count is rounded up to the nearest whole block.