Excavation and Loose Soil Volume Calculator
Calculate in-place excavation volume and loose haul volume from dimensions and a selectable swell allowance.
Formula
Planning estimate. Check product specifications and local requirements before purchasing.
Worked example: Excavation Calculator
Measurements in this example
| Length | 10 m |
|---|---|
| Width | 2 m |
| Layer depth | 1.2 m |
| Swell allowance | 25 % |
Calculated quantities
| In-place volume | 24 m³ |
|---|---|
| Loose volume | 30 m³ |
What to check
This calculation uses: Length, Width, Layer depth, Swell allowance. It returns: In-place volume, Loose volume.
Take dimensions at several points because trenches and excavations rarely have perfectly square sides or a level base.
The calculator uses rectangular geometry. Allowances are applied after the measured in-place volume has been established.
Use the result to plan supply and transport, then check ground conditions, compaction and disposal rules with the contractor.
Services, unstable sides, groundwater and safe working slopes are not quantities that a volume calculation can resolve.
Use the units beside each field. The values in the worked example are starting inputs; replace them with your measurements and the specifications of your material.
Compare alternatives
Open a tool, enter your measured dimensions, then save an estimate. Keep another version if you want to compare products or allowances.