Quick answer
Calculate the placed volume first, convert it to cubic yards and keep the allowance visible. The supplier then determines truck capacity, minimum load, delivery window, mix availability and short-load charges.
Step by step
- Finish the quantity Use actual dimensions and split irregular areas into measurable sections.
- Add allowance Account for uneven subgrade, form variation and small losses without hiding the percentage.
- Check supplier rules Ask about minimum load, truck capacity, washout, slump and mix availability.
- Prepare the pour Confirm access, crew, forms, reinforcement, tools and weather before the truck arrives.
Formula or rule of thumb
Example
A measured 5.8 yd³ with a 7% planning allowance becomes 6.21 yd³, then the supplier may require a practical order quantity based on its dispatch rules.
Common mistakes
Ordering from footprint only, forgetting thickness variation, waiting until the truck arrives to solve access, and assuming every supplier uses the same minimum load.
Planning note: product yields, installation methods, site conditions and local requirements can change the final quantity. Use the exact manufacturer or supplier information before purchasing.
Decision guide
| Decision point | What the estimate tells you | What to verify |
|---|---|---|
| Measurements | Start with accurate project dimensions and the correct units. | Replace generic assumptions with site measurements. |
| Product data | Use the actual package yield, coverage or density. | Check the current manufacturer or supplier label. |
| Final decision | Treat the result as an early planning estimate. | Confirm final quantities and requirements before purchase. |
Authority and verification
RenoMetric provides transparent planning arithmetic, not a structural design or contractor quote. Verify final decisions with the current product label or supplier data, the applicable local requirements, and a qualified professional when the project is safety-critical.
- RenoMetric methodology — formulas, units and planning limitations.
FAQ
How much concrete is in a truck?
Capacity varies by truck, supplier, mix and legal payload; ask the local supplier.
Should I order extra?
A visible allowance is prudent, but excessive over-ordering creates waste and disposal problems.
Does the calculator schedule the pour?
No. Delivery timing, crew, access and weather require project coordination.