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Online Concrete Calculator
Estimate concrete volume for slabs, walls, columns, footers, steps, and more in cubic meters, yards, and feet, with optional cost — free.
| Answer | |
|---|---|
| Cubic Meters | 120 m³ |
| Cubic Yards | 156.954074 yd³ |
| Cubic Feet | 4237.76001 ft³ |
| Cost ($) | |
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What Is This Tool?
The Concrete Calculator estimates how much concrete a pour needs based on its shape and dimensions. Pick from eight shapes — square slab, round slab, wall, footer, square column, round column, steps, and curb and gutter — enter the measurements, and the tool returns the volume at once in cubic meters, cubic yards, and cubic feet. You can choose the unit your measurements are in, multiply by a quantity for several identical pours, and add an optional price per cubic unit to estimate the total cost. The result can be downloaded as a PDF.
How to Use This Tool?
- Choose the shape you are pouring from the dropdown.
- Enter the dimensions shown for that shape.
- Set the units and quantity, and optionally a price per cubic unit.
- Click Calculate, then download the result as a PDF if needed.
Key Features
- Calculates concrete volume for eight shapes, from slabs and walls to columns, steps, and curb and gutter.
- Shows the result at the same time in cubic meters, cubic yards, and cubic feet.
- Lets you enter measurements in meters, centimeters, millimeters, inches, feet, or yards.
- Includes a quantity multiplier and an optional price per cubic unit to estimate total cost.
- Download the full result as a PDF.
Examples
- A square slab measuring 10 by 2 by 6 meters works out to 120 m³, about 156.95 yd³ or 4237.76 ft³.
- A round slab uses its diameter and depth, with the area based on pi times diameter squared over four.
- Setting the quantity to 4 for identical footers multiplies the single-footer volume by four.
- Adding a price per cubic yard turns the volume into an estimated total cost.
Common Use Cases
- Homeowners planning a patio, driveway, or slab project.
- Contractors estimating concrete for a pour before ordering.
- Working out how much ready-mix concrete to order by volume.
- Budgeting a project by attaching a price per cubic unit.
- Comparing the concrete needed across different shapes or designs.
Tips & Best Practices
- Measure each dimension carefully, since small errors scale up over a large pour.
- Make sure your measurements match the unit you select.
- Order a little extra concrete, as the tool does not add a waste allowance.
- Use the quantity field for several identical elements instead of calculating each one.
- Confirm the selected shape matches the actual form you are pouring.
Limitations
- It estimates volume only and does not add a waste or spillage allowance.
- The optional cost uses a single price per cubic unit and excludes rebar, labor, and delivery.
- It assumes regular, simple shapes, so irregular or custom forms are not supported.
- It is a geometric estimate for ordering, not an engineering or structural specification.
Frequently Asked Questions
- Which shapes can it calculate?
- Eight: square slab, round slab, wall, footer, square column, round column, steps, and curb and gutter.
- Does it include extra for waste?
- No. It returns the exact geometric volume, so it is wise to order slightly more to cover spillage and uneven ground.
- What units can I use?
- You can enter measurements in meters, centimeters, millimeters, inches, feet, or yards, and the result is always shown in cubic meters, yards, and feet.
- How is the cost estimated?
- Enter an optional price per cubic meter, yard, or foot, and the tool multiplies it by the volume to give a total cost.
Key Terminology
- Concrete volume
- The amount of space a pour fills, used to work out how much concrete to order.
- Cubic yard
- A common unit for ordering concrete, equal to a cube one yard on each side.
- Footer
- A wide concrete base that spreads the load of a wall or column into the ground.
- Curb and gutter
- A combined concrete edge and channel cast along the side of a road or driveway.
- Diameter
- The distance across a circle through its center, used for round slabs and columns.