Concrete Wall Calculator
A concrete wall calculator finds the volume of a poured wall by multiplying its height by its length by its thickness, then converting to cubic yards. This is the right tool for foundation walls, retaining walls and stem walls. Enter the wall dimensions below to get cubic yards, bags and an estimated cost.
Thickness entered in inches; length and height in feet.
- 80 lb bags
- 0
- Estimated cost
- $0.00
Enter your dimensions to see the result.
Estimate only. Material yields and prices vary by supplier and region; confirm before ordering.
How Do You Calculate Concrete for a Wall?
To calculate concrete for a wall, multiply the wall length by its height by its thickness, working in feet, then divide by 27 for cubic yards. A wall 20 feet long, 8 feet high and 8 inches thick is 20 times 8 times 0.667, about 106.7 cubic feet, or 3.95 cubic yards. Walls use more concrete than people expect because the thickness applies across the whole face, which the calculator makes clear instantly.
How Thick Should a Concrete Wall Be?
Wall thickness depends on its job. Residential foundation walls are commonly 8 to 10 inches thick, while retaining walls vary with height and the load behind them. Thickness drives the volume directly, so a 2 inch change across a long wall moves the order by a noticeable margin. Always follow your engineered plans or local code for structural walls, then use the calculator to size the pour.
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Frequently asked questions
- How do I calculate concrete for a wall?
- Multiply wall length by height by thickness in feet, then divide by 27 for cubic yards. If thickness is in inches, divide it by 12 first. The calculator handles the conversion.
- How thick should a concrete foundation wall be?
- Residential foundation walls are commonly 8 to 10 inches thick, but the correct thickness depends on load and local code, so follow your engineered plans.