Concrete Truck Calculator
Enter concrete volume and truck capacity to compute the number of mixer-truck deliveries (with wastage) and compare against the minimum load, for site ordering and scheduling.
Input Data
Results
At a glance:Total with wastage = volume × (1 + wastage%). If the total is below the minimum load, charge at the minimum. Trucks needed = ⌈charged volume ÷ truck capacity⌉. Hong Kong ready-mix is mostly delivered by mixer trucks whose capacity is limited by road and weight, commonly 6–9 m³; sites must coordinate with pumps and pour rate for scheduling.
Formula
Total = volume × (1 + wastage%)
Charged volume = max(total, minimum load)
Trucks = ⌈charged volume ÷ capacity⌉
$$V_t = V_0(1+w)$$$$V_c = \max(V_t, V_{\min})$$$$N = \left\lceil \frac{V_c}{C} \right\rceil$$How to Use
- Enter the concrete volume (m³).
- Select the mixer-truck capacity.
- Set the wastage and minimum load.
- The tool outputs total with wastage and trucks needed.
Case Studies
Basement slab
10 m³, 6 m³ capacity, 5% wastage, minimum 4.
Total 10.5 m³; trucks ⌈10.5/6⌉ = 2 loads.
Small plastering
2 m³, 6 m³ capacity, 5% wastage, minimum 4.
Total 2.1 m³; below minimum, charged at 4 m³, 1 truck.
FAQ
Why set a minimum load?
Suppliers set a minimum to cover dispatch cost; below it is still charged at the minimum, so very small jobs may not be economical.
Is a bigger truck always better?
Large trucks have a lower unit price but are limited by site road, pump position and pour rate, so they must fit site conditions.
Related Tools
References
Content review: Calculatorism Construction Team. Results are for reference only; please refer to the relevant authorities for the official figures.