Retaining Wall Block & Gravel Backfill Calculator

Calculate concrete retaining wall blocks, cap stones, drainage stone backfill (tons), and buried base trench gravel for landscaping.

  • 100% free
  • Private in browser
  • No signup
  • No watermarks
Total Wall Blocks (Includes 10% Overage)
396
Number of Block Rows / Courses
12
Capping Stones Count
32
3/4" Crushed Drainage Gravel (Tons)
5.4

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About Retaining Wall Block & Gravel Backfill Calculator

Calculate concrete retaining wall blocks, cap stones, drainage stone backfill (tons), and buried base trench gravel for landscaping. Enter Wall Length, Exposed Wall Height and Single Block Face Length and the tool works out Total Wall Blocks, Number of Block Rows / Courses and Capping Stones Count straight away. Everything runs in your browser, so your data never leaves your device.

How to use Retaining Wall Block & Gravel Backfill Calculator

  1. Enter Wall Length, Exposed Wall Height and Single Block Face Length.
  2. Adjust the remaining options (Single Block Face Height) to match your case.
  3. Read Total Wall Blocks, Number of Block Rows / Courses and Capping Stones Count in the results panel — copy or download what you need.

Key features

  • Shows Total Wall Blocks (Includes 10% Overage)
  • Shows Number of Block Rows / Courses
  • Shows Capping Stones Count
  • 4 adjustable inputs, results update as you type
  • No signup, no limits

Frequently asked questions

Is this calculation free and private?
Yes, 100% of calculations execute locally in your web browser. No inputs or personal data are stored or transmitted.
What does the Retaining Wall Block & Gravel Backfill Calculator give me?
It works out Total Wall Blocks, Number of Block Rows / Courses, Capping Stones Count and 3/4" Crushed Drainage Gravel, updating live as you change the inputs.
What do I need to enter?
Just Wall Length, Exposed Wall Height, Single Block Face Length and Single Block Face Height. Every field has a sensible default you can start from.
Is my data uploaded anywhere?
No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.
Does it work on a phone?
Yes. The layout adapts to small screens and needs no app or signup.

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