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Retaining Wall Calculator

Enter the values below to calculate the estimated cost and material needed to build a wall that retains.

Wall Dimensions

Height:

yd ▾

Length:

ft ▾

Single wall block price

Length:

in ▾

Single cap block price

Length:

cm ▾

Height:

ft ▾

Height:

in ▾

Block Dimensions:

Cap Block Dimensions:

Gravel for backfill

Backfill area length:

cm ▾

Backfill area thickness:

ft ▾

Gravel price (per unit):

ft ▾

Backfill area height:

$ Us ton ▾

Related

Our poured concrete retaining wall calculator helps you estimate how many blocks are needed to construct a retaining wall. Additionally, it can calculate the approximate cost of your project.

What Is a Retaining Wall?

A retaining wall is a man-made structure designed to stabilize soil and support slopes.

Main Functions:

Retaining walls serve both functional and aesthetic purposes. Common reasons for building them include:

Preventing soil erosion
Creating terraces or landscaped areas
Protecting against soil collapse or movement

How Many Retaining Wall Blocks Are Required?

Calculating the number of blocks can be tricky due to the variety of materials used. Our retaining wall calculator simplifies this by considering the following steps:

Measure the Wall:

Start by measuring the wall’s width, length, and height in feet and inches or your preferred unit.

Calculate Rows and Columns:

Next, determine the number of rows and columns using these formulas:

$Wall Columns = \frac{Wall Width}{Block Width}$

$Wall Rows = \frac{Wall Height}{Block Height}$

Compute Total Blocks:

$Total Blocks = Rows \times Columns$

If you plan to add cap blocks, their number equals the calculated number of columns.

$Backfill Gravel Volume = Backfill Thickness \times Backfill Length \times Backfill Depth$

$Backfill Weight = Gravel Density \times Backfill Volume$

Estimating Retaining Wall Costs:

The project cost depends on the number of blocks used. For instance:

Reshaeel built a wall needing around 500 blocks. If each block costs $2.30, the total block expense is:

Total cost = $2.30 × 500 = $1150

Using a concrete retaining wall calculator can give the same results but saves time and ensures accuracy.

How the Retaining Wall Calculator Works:

Our retaining wall calculator quickly produces accurate results when you follow these steps:

Input:

Provide the following details in the estimator:

Wall dimensions: length, height, and width
Block dimensions: length, height, and width
Backfill gravel details
Cost per block or estimated material price

Output:

Estimated material requirements (wall blocks, cap blocks, backfill gravel volume & weight)
Estimated total project cost (wall blocks, cap blocks, backfill gravel, and total)

References:

From Wikipedia: Retaining wall, Types and alternative retaining techniques

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