Estimate how much concrete you need for a wall before you order or mix. Enter wall length, height and thickness, subtract a door or window opening when needed, calculate multiple identical walls, or estimate a circular wall shell. The Concrete Wall Calculator shows cubic feet, cubic yards, cubic metres, an optional concrete bag estimate, waste allowance and material-only concrete cost.
All numeric fields start at 0. Select the wall type, enter valid dimensions and press Calculate Wall Concrete. The result stays hidden until the calculation is requested.
Your result will appear here after you press Calculate Wall Concrete.
The PDF includes wall type, dimensions, opening deduction where applicable, base volume, waste allowance, rounded order volume, optional bag estimate and concrete-only cost.
Concrete wall volume uses length, height and thickness. Convert wall thickness from inches to feet before multiplying, then divide cubic feet by 27 to get cubic yards.
The tool separates wall geometry from structural design and keeps the main estimating numbers easy to compare.
See the exact geometric wall volume before converting to ordering units.
Compare the wall volume with ready-mix concrete quantities.
Subtract door or window volume from a wall when required.
Add a practical allowance for real forms and placement conditions.
Apply your own local concrete rate per cubic yard.
Save the main dimensions and volume estimate for project planning.
A concrete wall estimate needs three dimensions: wall length, wall height and wall thickness. Length and height create the face area, while thickness turns that area into a volume. For U.S. concrete ordering, it is usually convenient to calculate cubic feet first and then divide by 27 to convert the result to cubic yards.
The calculation is straightforward for a solid rectangular wall, but real walls can include doors, windows, sleeves, pilasters, thickened sections, footings and returns. The most accurate approach is to calculate each distinct concrete shape separately, subtract genuine openings and then add the individual volumes together.
Cubic Yards = Length (ft) × Height (ft) × [Thickness (in) ÷ 12] ÷ 27
Measure the length of the concrete section that will actually be poured. If the wall changes thickness, height or direction, splitting it into separate segments can make the estimate more reliable. Long foundation walls may be easier to calculate as several rectangular sections.
Use the actual concrete height from the bottom of the wall to the top. Do not automatically include the footing unless the footing is being poured as part of the same shape and you intentionally include its volume. In many estimates, the wall stem and footing are calculated separately because they have different widths.
Wall thickness is often specified in inches. Divide inches by 12 before multiplying by wall length and height in feet. An 8-inch wall is 0.6667 ft thick, a 10-inch wall is 0.8333 ft thick, and a 12-inch wall is 1 ft thick.
| Wall Thickness | Thickness In Feet | Concrete Per 100 ft² Wall Face | Concrete Per 500 ft² Wall Face |
|---|---|---|---|
| 6 in | 0.5000 ft | 1.852 yd³ | 9.259 yd³ |
| 8 in | 0.6667 ft | 2.469 yd³ | 12.346 yd³ |
| 10 in | 0.8333 ft | 3.086 yd³ | 15.432 yd³ |
| 12 in | 1.0000 ft | 3.704 yd³ | 18.519 yd³ |
A 20-foot-long wall that is 8 feet high has a wall-face area of 160 ft². At 8 inches thick, the thickness is 8 ÷ 12 = 0.6667 ft. Multiply 20 × 8 × 0.6667 to get approximately 106.67 ft³. Divide by 27 and the wall contains about 3.951 yd³ before waste.
20 × 8 × (8 ÷ 12) = 106.67 ft³ → 106.67 ÷ 27 = 3.951 yd³
A true opening removes concrete. Calculate the opening area as width × height, multiply by the same wall thickness and subtract that volume from the gross wall. If there are several identical openings, multiply the opening volume by the opening quantity.
For example, a 3 ft × 7 ft door opening in an 8-inch wall removes about 14 ft³ of concrete, or approximately 0.519 yd³. The calculator's Wall With Opening option performs this deduction automatically.
If several walls have identical dimensions, use the Multiple Walls option. One wall is calculated first, then multiplied by the number of walls. If the walls are different lengths or heights, calculate each group separately for better accuracy.
A circular wall is a cylindrical shell rather than a solid cylinder. The calculator uses the outside diameter and wall thickness to calculate the difference between the outer cylinder and inner cylinder, then multiplies that ring-shaped area by wall height.
Volume = π × (Outer Radius² − Inner Radius²) × Height
Circular concrete walls can occur in tanks, pits, utility structures, planters and specialty foundations. Confirm whether the dimension supplied on the drawings is an inside diameter, outside diameter or centerline diameter before calculating.
Foundation walls are commonly rectangular and can be estimated from length × height × thickness. Footings are normally wider than the wall and should be calculated separately unless the project detail specifically treats them as one continuous geometry. Use the concrete footing calculator for the footing volume.
Basement walls may include windows, doors, beams, ledges and steps in wall height. Measure each wall run independently when the height or thickness changes. Subtract large openings and add thicker structural sections separately rather than relying on one average wall thickness.
The calculator can estimate the concrete volume of a retaining-wall stem when the stem length, height and thickness are already known. Retaining walls frequently include a footing, heel, toe, key, counterforts or varying wall thickness, so those elements should be calculated separately.
Retaining-wall design also depends on lateral earth pressure, drainage, surcharge, soil properties, sliding, overturning and bearing capacity. A material-volume calculator cannot determine whether a retaining wall is structurally adequate.
Concrete volume increases directly with wall thickness. A 12-inch wall contains 50% more concrete than an 8-inch wall of the same length and height because 12 inches is 1.5 times 8 inches. This relationship is useful for estimating, but it is not a reason to change the specified thickness.
There is no universal waste percentage for concrete walls. Well-built forms create a predictable volume, but additional material can be needed for form movement, overfilled sections, pump or hose losses, spills and small dimensional differences. Supplier order increments can also affect the final amount you book.
The calculator therefore lets you enter your own contingency percentage. Keep the exact geometric volume visible, then decide how much extra material is appropriate for the actual project and supplier requirements.
Small garden walls, curb-like walls or repairs may be practical with bagged concrete. To estimate bags correctly, enter the manufacturer's finished yield per bag in cubic feet. The calculator divides the volume after waste by that yield and rounds up to whole bags.
Larger walls can require a very high bag count. In that case, compare bagged material with ready-mix based on labor, mixer capacity, continuity of placement, access and total cost. You can also use the concrete bags to cubic yards calculator to convert an existing bag quantity into total volume.
Enter a concrete rate per cubic yard to estimate the concrete-only material cost. The calculator multiplies the rounded planning volume by the rate you enter. It does not include formwork, ties, walers, bracing, reinforcement, anchor bolts, embeds, pumping, labor, finishing, waterproofing or excavation.
If a wall requires a rounded planning quantity of 5.2 yd³ and your material rate is $190 per cubic yard, the concrete-only estimate is $988. Delivery, short-load fees and pump charges may still apply depending on the supplier and site.
This Concrete Wall Calculator estimates material volume only. It does not design wall thickness, reinforcement, form pressure, footing size, retaining-wall stability, lateral capacity, waterproofing, drainage, concrete strength, exposure classification, joints or structural performance.
For related calculations, use the concrete floor calculator, concrete footing calculator, concrete volume calculator and concrete cost calculator.
The calculator estimates how much concrete a wall shape contains. Structural capacity depends on separate design requirements.
Wall height affects both concrete volume and structural behavior.
Rebar layout and anchorage must follow the project design.
Earth pressure, wind and structural loads are separate from volume.
Wall footings usually require their own volume and structural calculation.
These examples demonstrate volume only and are not wall-thickness or structural recommendations.
| Wall Example | Dimensions | Opening | Base Volume | With 10% Allowance |
|---|---|---|---|---|
| Small Wall | 10 ft × 4 ft × 6 in | None | 0.741 yd³ | 0.815 yd³ |
| Foundation Wall | 20 ft × 8 ft × 8 in | None | 3.951 yd³ | 4.346 yd³ |
| Wall With Door | 20 ft × 8 ft × 8 in | 3 ft × 7 ft | 3.432 yd³ | 3.775 yd³ |
| Long Wall | 40 ft × 8 ft × 10 in | None | 9.877 yd³ | 10.864 yd³ |
| Heavy Wall | 30 ft × 10 ft × 12 in | None | 11.111 yd³ | 12.222 yd³ |
Answers about wall thickness, openings, retaining walls, cubic yards, bags, waste and concrete cost.
Multiply wall length by wall height by wall thickness after converting thickness to feet. The result is cubic feet. Divide by 27 to convert cubic feet to cubic yards.
The wall contains about 106.67 cubic feet, which is approximately 3.951 cubic yards before subtracting openings or adding waste.
Yes. Use the Wall With Opening option. The calculator subtracts opening width × opening height × wall thickness from the gross wall volume.
Yes. Use the Multiple Walls option and enter one wall's dimensions plus the quantity.
Yes. The Circular Wall option calculates the volume of a cylindrical wall shell from diameter, wall thickness, wall height and quantity.
No. Wall thickness depends on structural loads, height, reinforcement, lateral earth pressure, exposure, code and project design. Enter the thickness specified for the actual project.
It can estimate the concrete stem volume when the retaining wall stem dimensions are known. Footings, keys, counterforts and other elements should be calculated separately.
Yes. Enter a waste or contingency percentage. The calculator shows base volume, volume after waste and a rounded planning quantity.
Yes. Enter the manufacturer's finished yield per bag in cubic feet. The calculator divides the planned volume by that yield and rounds up to whole bags.
Yes. Enter a local concrete rate per cubic yard. The material-only estimate does not include forms, reinforcement, pumping, labor, finishing, excavation or delivery fees.
An opening reduces concrete by its width × height × wall thickness. Multiple openings should be calculated and deducted individually or combined into an equivalent total opening area.
Yes. After calculating, use the PDF button to save the wall type, dimensions, openings, base volume, waste allowance, rounded order volume, optional bag estimate and cost.
Use approved project documents, applicable codes and authoritative concrete resources alongside any online material estimate.
Technical codes, standards and educational resources for structural concrete.
Visit ACIDigital building-code resources used by many jurisdictions.
Visit ICC Digital CodesManufacturer estimating guidance for packaged concrete and common project shapes.
Visit QUIKRETE CalculatorWorkplace information about respirable crystalline silica hazards associated with concrete work.
Read OSHA Guidance