Aggregate delivery beside a gravel pile and a volume container. Original AI-generated artwork produced for GreenCalc; the scene is not a measured construction drawing.
A measured cavity, a loose delivery and a finished compacted layer can have different volumes. Keep those states separate before deciding how much material to order. A cubic-yard result becomes a purchasing quantity only after the material condition, chosen allowance and supplier's selling increment are specified.
Label the state of the volume
Net geometric volume is the space defined by your measurements. Loose volume describes material before any specified placement or consolidation. Finished volume describes the layer after the intended process. Moisture, grading and handling can affect the relationship, so there is no single reliable conversion percentage for every soil, aggregate or mixed material.
The Cubic Yard Calculator reports a geometric net volume and a second volume using your explicit allowance. It does not silently select a compaction factor, assume a truck carries a fixed number of yards, or convert yards into tons without material information.
Work through one order in a fixed sequence
Assume a measured space totals 2.35 cubic yards. You decide to examine an 8% allowance, and the supplier says that this particular order is sold in half-yard increments. These are stated example assumptions, not default recommendations.
| Stage | Calculation | Quantity |
|---|---|---|
| Measured net space | From the project dimensions | 2.35 yd³ |
| Allowance scenario | 2.35 × 1.08 | 2.538 yd³ |
| Supplier increment | Round 2.538 up to a multiple of 0.5 | 3.0 yd³ |
At a hypothetical 60 currency units per cubic yard, 3.0 yards costs 180 before any other charges. Pricing the unrounded 2.538 yards gives 152.28, which is a useful intermediate estimate but not the cost of a supplier who will sell only the rounded order.
Do not hide a conversion inside an allowance
A documented material conversion and a general contingency answer different questions. If a supplier or project specification gives a loose-to-finished relationship, write down which direction it operates. A factor that converts a finished quantity into a loose quantity cannot be inverted merely by subtracting the percentage.
For instance, if an explicitly supplied factor were 1.20 loose units per finished unit, 10 finished units would require 12 loose units on that model. Recovering the finished quantity from 12 loose units requires division by 1.20, not a 20% subtraction. Whether the factor belongs to the actual material is a separate evidence question.
Separate volume limits from weight limits
A vehicle may have enough bed volume while lacking enough permitted payload. Cubic yards measure space; payload is a mass limit. A weight estimate needs an appropriate bulk density and the actual loading condition. It also has to be checked against the vehicle and supplier requirements.
The Size to Weight Calculator can illustrate density times a rectangular material volume, but its result is not a vehicle loading authorisation. For loose material, the density must be a bulk density compatible with the entered volume, rather than a solid-grain density that excludes voids.
Write the supplier questions beside the quantity
- Is the quote based on loose volume, finished volume or measured weight?
- What is the smallest selling increment for this order?
- Does the supplier require a minimum order or charge for a partial load?
- Are delivery, access restrictions and unloading charges separate?
- Is there a material-specific factor that the project specification requires?
When the project contains different shapes, first produce a checked net total using the mixed-shape volume worksheet. For an actual garden-bed fill, use the existing Soil Calculator and its garden-specific planning guide; that tool owns the soil-bag workflow rather than this general delivery discussion.
Use the Construction calculator collection to follow the measurement workflow, or visit the GreenCalc home page for the complete tool directory.
By GreenCalc Editorial Team · Updated 2026-10-22
Frequently asked questions
Is loose delivery volume necessarily equal to finished volume?
No. The relationship depends on the material, state and placement process, and needs an appropriate project-specific basis.
When should supplier increments be applied?
After the chosen quantity adjustments, round the final order to the increment the supplier actually sells.