Excavation calculator
Estimate outputs: In-place volume, Loose volume. Adjust Length, Width, Layer depth to match your project.
Estimate outputs: In-place volume, Loose volume. Adjust Length, Width, Layer depth to match your project.
Inputs and units
Use the units shown beside each field. Replace the sample values with your measurements and the figures on the selected product packaging.
| Parameter | Example input |
|---|---|
| Length | 10 m |
| Width | 2 m |
| Layer depth | 1.2 m |
| Swell allowance | 25 % |
Formula and assumptions
In-place volumeLength × Width × Layer depth
Loose volumeIn-place volume × (1 + Swell allowance / 100)
ceil = round up; floor = round down; max = the greater value. Trigonometric angles are converted from degrees to radians.
Allowance is applied before rounding to whole packages. Whole units are rounded up; displayed decimals are rounded only for readability.
Bulk density and compaction vary with moisture and the delivered material. The allowance does not model compaction; obtain the ordering conversion from your supplier.
Worked example
Sample values are examples, not product specifications. Run the calculation again with your own measurements.
| Result | Calculation |
|---|---|
| In-place volume | 24 m³ |
| Loose volume | 30 m³ |
Related calculators
Related tools use separate measurements. Check their inputs before transferring quantities.
These are quantity estimates. Confirm product coverage, site conditions and required dimensions before ordering.