Concrete calculator
Estimate your cubes
Use this simple calculator for a rectangular slab or pour, then carry the result into the Rock-Tuff quote builder.
Volume estimate
Length × width × thickness
Enter measurements in metres and thickness in millimetres. The calculator converts the thickness to metres and returns an estimated volume in cubic metres.
Estimate only: site conditions, excavation tolerances, uneven bases and project requirements can affect the final volume. Confirm your order quantity before booking delivery.
Strength / MPa
Quantity is one part — Specification is another
The calculator estimates volume only. The required concrete strength or mix must follow the project specification. Rock-Tuff’s quote builder lets you select a standard mix, request a special mix design or ask for assistance if you are unsure.
View Concrete Mixes →