Excavation & Backfill Calculator
Excavation & Backfill Calculator
Build a pit schedule and estimate excavation, spoil and backfill.
Excavated ground, loose spoil and backfill are different quantities. A pit schedule helps keep those stages separate.
Enter rectangular excavation dimensions and the volume assumptions for the work. Add site details such as sloped sides or shoring through a separate measured plan.
How to use Excavation & Backfill Calculator
- Choose measurement unit. Enter permanent occupied volume.
- Enter loose spoil factor, delivered fill factor and truck capacity.
- Enter excavation rate and delivered fill rate.
- Add the entries in excavation schedule as separate rows. Include reference, length, width, depth and quantity for each row.
- Select Calculate estimate. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.
Why choose this tool?
Several pit rows make the earthwork estimate easier to trace when the project includes foundations, trenches and other rectangular cuts.
Before you use the result
Rectangular excavation volumes only. Sloped sides, shoring and site access are not assessed.
Questions about Excavation & Backfill Calculator
Does this assess excavation safety?
No. Ground conditions, shoring, access and safe working methods require site assessment. The calculation is a volume planning aid.
What should I check before using Excavation & Backfill Calculator?
Check Measurement unit, Permanent occupied volume, Loose spoil factor and Delivered fill factor. Use the exact units shown beside the controls and replace any example values with your own inputs.
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