Retaining wall block estimator
Retaining wall block estimator: calculate a transparent estimate from the values and assumptions you provide.
Your inputs stay in your browser. Displayed results are rounded to a maximum of 12 significant digits.
Method and assumptions
Method version 1.0.0 · Updated
Calculate
Formula: ⌈wall area / block area × (1 + allowance)⌉
Retaining wall block estimator: calculate a transparent estimate from the values and assumptions you provide.
- wallLength
- Wall length (m)
- wallHeight
- Wall height (m)
- blockLength
- Block length (m)
- blockHeight
- Block height (m)
- wastePercent
- Allowance (%)
Does not size foundations, drainage or wall stability.
Calculate with code
These short examples use the same inputs and core calculation as this tool. Adapt validation and formatting to your application.
JavaScript
const blocks = Math.ceil(12 / (0.4 * 0.2)); // 150