Estimate how much concrete you need for your project and get a practical starting point for planning, quoting and ordering.

Enter your dimensions to calculate an approximate volume in cubic metres (m³), helping you coordinate your project and discuss requirements with your contractor or supplier.

How to use this calculator

  1. Select the shape that matches your project
  2. Enter the required dimensions
  3. Add additional sections if your project includes multiple areas
  4. Review your total estimated volume

This calculator provides a practical estimate to support planning, quoting and ordering. Final quantities should be confirmed as part of your project planning and coordination with your contractor and supplier.

Your result

Your result shows the estimated volume of concrete required in cubic metres (m³), which is the standard unit for ordering.

This estimate is intended as a guide to support planning and quoting. Actual requirements may vary depending on site conditions, ground preparation and final project design.

Concrete supply and concrete placement are typically arranged separately. This estimate can be used to confirm quantities with your contractor and coordinate your order with your supplier.

What to do next

Once you’ve estimated your volume, the next step is to plan how your project will be delivered.

For most projects, this involves:

  • Confirming measurements and requirements with your contractor or project team
  • Engaging a concreter or contractor to prepare, place and finish the concrete
  • Ensuring site access, preparation and timing are coordinated
  • Arranging concrete supply and delivery

Boral supplies concrete materials for delivery to site. Your concreter or contractor can typically coordinate delivery timing and provide guidance on preparation and placement.

You can then:

  • Speak with your contractor to confirm requirements
  • Request a quote for your concrete supply
  • Find your nearest Boral plant

What is a concrete calculator?

A concrete calculator is a simple tool used to estimate the volume of concrete needed for a project based on its shape and dimensions.

It removes the need for manual calculations and helps you plan material requirements more efficiently before placing an order.

How to calculate concrete volume

Concrete volume is typically calculated using the formula:

Length × Width × Thickness

The result is then converted into cubic metres (m³).

For more complex projects involving multiple shapes, each section can be calculated individually and then added together.

Common project types

Different projects require different shapes and depths. This calculator supports a range of common applications.

Slabs

Used for driveways, patios, house slabs and shed bases. Typically require consistent thickness across the surface.

Footings

Used for structural support. Footings are often deeper and may vary in width depending on engineering requirements.

Walls

Used for retaining walls or vertical concrete elements. Calculations are based on length, height and thickness.

Columns

Used for posts or structural supports. These are usually calculated using a circular or square profile.

Steps

Need to account for multiple levels and varying dimensions.

Kerb and gutter

Often long and narrow, requiring consistent cross-section measurements.

Tips for more accurate estimates

  • Double-check your measurements before entering them
  • Use consistent units across all inputs
  • Break complex areas into smaller sections
  • Include all parts of the pour, including edges and footings

Frequently asked questions

This calculator provides an estimate based on the dimensions entered. Actual requirements may vary depending on site conditions, ground preparation and final project design. We recommend confirming quantities as part of your project planning.

Yes. You can add multiple shapes to estimate the total volume for projects with more than one section.

Concrete is typically ordered in cubic metres (m³). Your total volume is displayed in this unit to support planning and ordering.

The capacity of a concrete truck can vary depending on the vehicle and local conditions, but many agitator trucks carry around 6–8 cubic metres per load.
Your local Boral plant can confirm capacity for your area and project.

It is common to allow a small margin to account for factors such as ground variation, spillage during placement and minor measurement differences.
The appropriate allowance will vary depending on the project and site conditions. If you’re unsure, speak with your supplier or contractor before ordering.

 

The required thickness will depend on the application, ground conditions and load requirements.

As a general guide:

  • Pathways and patios are typically thinner
  • Driveways usually require a thicker slab
  • Structural elements like footings are deeper

For project-specific advice, always confirm with your contractor or engineer.

Reinforcement does not affect the volume calculation, but it is important for structural performance. Always follow engineering or project requirements.

Minimum order quantities can vary depending on location and plant. For smaller projects, your local Boral team can advise on suitable options and delivery arrangements.

For irregular areas, it can be helpful to break the space into smaller, simple shapes and calculate each section separately. The totals can then be combined to estimate the overall volume.

Boral supplies concrete materials but does not carry out concrete placement or finishing. Installation is completed by an independent concreter or contractor.

Concrete placement is typically arranged by your builder, contractor or project team. If you are managing your own project, you will need to engage a qualified concreter.

Boral does not provide contractor referrals. We suggest contacting local builders, contractors or industry associations to find a suitable concreter for your project.

For most projects, the process involves:

  • confirming requirements and measurements
  • engaging a concreter or contractor
  • coordinating site preparation and timing
  • arranging concrete supply and delivery

Your concreter will typically coordinate delivery timing and site requirements.

Request a quote