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Concrete Calculators & Tools
Foundation excavation estimate

Foundation Excavation Calculator

Estimate foundation excavation volume, loose soil after swell, haul-off quantity, and excavation cost from one clean dashboard.

Use the same file for both foundation excavation calculator and foundation excavation cost calculator pages.
Measurement inputs
Live calculation
Used in the printed report and saved report.
Choose the shape that matches the digging work.
Enter a length greater than 0.
Enter a width greater than 0.
Enter a depth greater than 0.
Extra space outside the foundation footprint. Overdig cannot be negative.
Enter a trench length greater than 0.
Enter a trench width greater than 0.
Enter a trench depth greater than 0.
Extra digging width for formwork or access. Allowance cannot be negative.
Enter a diameter greater than 0.
Enter a depth greater than 0.
Enter at least 1 hole.
Extra diameter from auger wobble or cleanup. Overdig cannot be negative.
Loose soil is often more than bank volume. Swell factor cannot be negative.
Machine, operator, or subcontractor rate. Cost cannot be negative.
Optional cost for loading and hauling loose soil. Cost cannot be negative.
Optional dump, spoil, or disposal charge. Cost cannot be negative.
Bank cubic yards per hour. Optional time estimate. Production rate cannot be negative.
Estimated excavation volume
0.00 cu yd
Bank volume before swell.
Bank cubic feet
Bank cubic meters
Loose volume after swell
Estimated machine time
Excavation cost
Hauling cost
Disposal cost
Total estimated cost
Volume = Length × Width × Depth
All measurements are converted to feet before calculation.