Retaining Wall Calculator: Estimate Materials & Costs Easily

Calculate Your Retaining Wall Materials

Enter the average thickness of your wall structure.
Leave blank if calculating a concrete wall or don't need block count.
Leave blank if calculating a concrete wall or don't need block count.
Thickness of the drainage layer behind the wall.

Planning a retaining wall? Our free online Retaining Wall Calculator helps you estimate the essential materials and costs, whether it\'s for erosion control, terracing, or a garden feature. Quickly determine the number of blocks, concrete volume, and gravel backfill needed, saving time and preventing overspending on your DIY or professional landscaping project.

Formula:

Total Wall Volume (Vwall): L × H × Twall

Number of Blocks (Nblocks): (L / Lblock) × (H / Hblock)

Backfill Volume (Vbackfill): L × H × Tbackfill

  • L: Wall Length
  • H: Wall Height
  • Twall: Wall Thickness (or approximate block width for overall volume)
  • Lblock: Individual Block Length
  • Hblock: Individual Block Height
  • Tbackfill: Backfill Material Thickness

Construction and Tools

<b>90 Day </b>: Instantly Find Dates 90 Days From Today or Any Given Date

Go to Calculator

<b>Labor Force Participation Demographic Gap </b>: Compare Workforce Engagement Rates

Go to Calculator

1/4 Mile ET : Estimate Your Quarter Mile Elapsed Time

Go to Calculator

12 Volt Wire Size : Optimize Your DC Circuit Design

Go to Calculator

16:9 Aspect Ratio : Find Widescreen Dimensions

Go to Calculator

180 Day : Easily Find Dates 180 Days Forward or Back

Go to Calculator