Ready-Mix Concrete Calculator

Calculate how much Ready-Mix Concrete you will need

How our calculator works

• Enter your measurements: Input the length, width, and depth of the area you need to pour concrete into.
• Instant Concrete Volume Calculation: Once you enter all dimensions, the calculator instantly provides the required concrete volume in cubic meters (m³), ensuring accuracy for your project.
• Avoid over or under ordering: The result helps ensure you order the right amount of concrete, reducing waste and preventing costly shortages.
• Works for any project: Suitable for concrete slabs, foundations, driveways, and patios, making it easy for both builders and DIYers to get accurate estimates.
• Account for wastage: It's wise to add 5-10% onto the required amount to avoid shortages, as it's always worth accounting for spillages and uneven surfaces.

Frequently Asked Questions

What is the standard depth for driveways, patios, and foundations?

• Patios & pathways → 75mm - 100mm
• Driveways → 100mm - 150mm
• Shed bases → 100mm
• House foundations → 150mm - 300mm

How do I calculate how much ready-mix concrete I need?

To determine how much ready-mix concrete you need, multiply the length × width × depth of your area. Since depth is often measured in millimeters, convert it to meters before calculating. For example, if you're pouring a slab that is 3m long, 10m wide, and 100mm (0.1m) deep, the calculation is 3 × 10 × 0.1 = 3.00m³. This means you need 3 cubic meters of concrete. Using our concrete calculator ensures accuracy and prevents miscalculations that could lead to overordering or shortages.

How much extra concrete should I order to account for waste?

It is recommended to order 5-10% extra concrete to account for spillage, uneven ground, and surface variations. This buffer ensures you don’t run short, especially when dealing with irregular terrain or manual leveling. For example, if your calculation requires 3.00m³ of concrete, ordering 3.15m³ to 3.30m³ provides enough to cover any unforeseen losses. Running out of concrete mid-project can cause delays, additional costs, and inconsistencies in the final pour, so it’s always best to round up rather than underorder.

What factors affect the cost of ready-mix concrete?

The cost of ready-mix concrete depends on several factors, including mix strength (C20, C25, C30, etc.), supplier pricing, and delivery fees. The further the delivery distance, the higher the transportation cost. Batch size can also impact pricing, as smaller loads often include extra fees. Additional factors include reinforcements such as fibers or additives for enhanced durability, and site accessibility, where difficult-to-reach locations may require extra equipment like concrete pumps. To get an accurate price, check the cost per cubic meter from your local supplier and factor in any extra charges based on your project’s location and requirements.