For a path, bed or base layer of approximately uniform depth. Measure the area that will actually receive aggregate.
- Length, width and layer depth
- Horizontal rectangle dimensions and the thickness of the same layer.
- Allowance
- An optional percentage applied to volume after the geometry is calculated.
One rectangular layer per calculation. Split irregular areas into non-overlapping rectangles and keep each layer separate.
- Base volume and volume including the chosen allowance. This tool reports volume rather than mass.
A narrow path with an assumed 15% extra volume.
| Quantity | Value |
|---|---|
| Length × width × depth | 5 × 1 × 0.10 m |
| Allowance | 15 % |
| Base; with allowance | 0.500; 0.575 m³ |
Volume = length × width × depth. Extra = base × 0.15; total = base × 1.15. Values are shown to three decimals.
The app does not infer aggregate density, compaction or loose-to-compacted conversion. An allowance is not a tested compaction factor. Confirm the delivery volume basis with the supplier.
Metric and imperial dimensions and volume display are available. Do not enter centimetres in a field currently labelled millimetres.
Can it calculate tonnes of gravel?
This gravel tool gives volume. A mass conversion requires a suitable bulk density from the supplier.
Is 15% always enough?
No. It is only the assumption in this example; depth variation and the material’s delivered state affect the order.
- Can it calculate tonnes of gravel?
- This gravel tool gives volume. A mass conversion requires a suitable bulk density from the supplier.
- Is 15% always enough?
- No. It is only the assumption in this example; depth variation and the material’s delivered state affect the order.
Measurements, units and material terms
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