How Many Bricks Do I Need for a 10-Foot Retaining Wall?

Quick Answer: Bricks for a 10-Foot Wall

The number of bricks depends on wall height, brick size, mortar joints and wall construction. For this example, we estimate approximately 6.86 standard modular bricks per square foot of wall face.

These estimates cover one wall face using the stated assumptions. Actual quantities may differ based on the selected brick, mortar joint, bond pattern, wall thickness and design details.

How to Calculate Bricks for a 10-Foot Wall

Follow these three steps:

1. Calculate the wall area: multiply the length by the height in feet.
2. Estimate the brick quantity: multiply the area by approximately 6.86 bricks per square foot for this example.
3. Allow for waste: add an appropriate allowance for cuts, breakage and the wall layout.

Worked Example: A 10-Foot Wall That Is 2 Feet High

Assume the wall is 10 feet long and 2 feet high.

• Wall area = 10 × 2 = 20 square feet.
• Estimated bricks = 20 × 6.86 ≈ 138 bricks.
• With an example 10% allowance = 138 × 1.10 ≈ 152 bricks.

The preliminary estimate is about 152 bricks, including the example allowance. Confirm the quantity against the actual brick product and project drawings before ordering.

Why Brick Size and Mortar Joints Matter

Brick dimensions vary by product and manufacturer. Mortar joints also affect how many units fit into a given wall area. Larger bricks generally cover more area per unit than smaller bricks.

Check the manufacturer's dimensions and ask your supplier for the coverage rate of the exact brick you intend to use. A wall with multiple brick layers, piers, corners or special units may require a different calculation.

How Much Extra Material Should I Buy?

Extra bricks can help cover cuts, breakage and minor measurement differences. The right allowance depends on the layout, brick type and workmanship. The 10% allowance in this article is an example, not a universal rule.

Ask your mason or supplier to recommend an allowance for your project. Also check whether bricks are sold individually, by bundle or by pallet, and round the order appropriately.

Important Retaining Wall Safety Considerations

A retaining wall must resist soil pressure and may be affected by water, drainage, soil conditions, frost and nearby loads. Depending on its height and site conditions, it may need an engineered design, a suitable footing, reinforcement and a drainage system.

Ordinary brick veneer or a simple brick face should not automatically be treated as a structural retaining wall. Check local building requirements and consult a qualified engineer or designer before construction. A brick count alone cannot establish whether a retaining wall is safe.

Common Brick Estimation Mistakes

• Forgetting to include the wall height.
• Mixing inches and feet without converting units.
• Using a generic brick coverage rate without checking the product.
• Forgetting corners, returns, piers or extra wall thickness.
• Adding a waste allowance twice.
• Ordering bricks before confirming the wall design.

Use the CornerSpan Brick Calculator

Use the CornerSpan Brick Calculator for a general wall estimate. You can also read our Brick Calculation Guide and US Brick Sizes Guide to review common brick dimensions and estimation methods.

Frequently Asked Questions

How many bricks do I need for a 10-foot wall that is 1 foot high?

Using this guide's assumptions, approximately 69 bricks before waste, or about 76 with the example 10% allowance.

How many bricks do I need for a 10-foot wall that is 2 feet high?

Approximately 138 bricks before waste, or about 152 with the example 10% allowance, for one wall face.

Does this estimate include mortar?

No. This is a brick-unit estimate only. Mortar quantity depends on brick dimensions, joint thickness, bond pattern and the mortar product.

Can I use this estimate for every retaining wall?

No. It is a preliminary face-area estimate. Wall thickness, structural design, reinforcement, drainage and special components can change the materials required.