When to use this calculator
Estimate excavated in-place volume for a rectangular dig. Rectangular in-situ geometry only. Side slopes, overdig, services and swell factors need separate treatment.
Explore the material quantities calculators for other questions in this topic. For a related calculation, use the Fence Picket Calculator: Estimate vertical fence pickets for a measured clear run and selected spacing.
PUTTING IT INTO PRACTICE
Excavation Volume: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Excavation length (m) | 10 |
| Width (m) | 2 |
| Depth (m) | 1.5 |
| Result | 30 m³ |
- Check the input labels and enter the example values above.
- Apply the relationship: In-situ volume = length × width × depth.
- The result is 30 m³, rounded for display.
How to interpret your result
Rectangular in-situ geometry only. Side slopes, overdig, services and swell factors need separate treatment.
Calculate net geometric quantities first, then apply a project-specific allowance where appropriate. Coverage per bag or pack should come from the product label. Bulk density, trimming and compaction can substantially change order quantities.
Frequently asked questions
Does a geometric estimate include waste automatically?
Only when a waste or allowance input is provided. Otherwise add an appropriate allowance separately before ordering.
When is the excavation volume calculator useful?
Estimate excavated in-place volume for a rectangular dig. Rectangular in-situ geometry only. Side slopes, overdig, services and swell factors need separate treatment.
How do I use the excavation volume calculator?
Enter excavation length (m), width (m), depth (m). The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
In-situ volume = length × width × depth.
What should I check before using the result?
Rectangular in-situ geometry only. Side slopes, overdig, services and swell factors need separate treatment.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
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