Estimate the working days required to complete a defined excavation quantity. The calculator combines crew size, hours per day, labor productivity, and expected efficiency to find daily capacity, exact duration, a rounded scheduling allowance, and total crew-hours. It is useful for checking a baseline schedule before adding weekends, weather days, mobilization, or other project-specific constraints.
Working days = total quantity ÷ daily capacity.
Exact working days support comparisons and cost estimates; the rounded result is the minimum number of full crew days to reserve when partial-day scheduling is impractical.
This is a production-time estimate, not a promised completion date. Add mobilization, inspections, curing, shutdowns, weather, and calendar constraints separately.
For 5,000 yd³, a 5-person crew working 10 hours at 9 yd³ per worker-hour and 80% efficiency produces 360 yd³ per day. The job takes 13.89 working days, so plan 14 full days.
The calculator divides total excavation quantity by the crew’s efficiency-adjusted daily capacity.
Use a documented rate in yd³ per worker-hour from a comparable job, estimate, or recent field record.
No. The result is in working days. Convert it to calendar time using your actual work calendar.
A crew generally needs another scheduled workday when the calculated duration contains any remaining fraction.
Lower efficiency reduces daily capacity and increases working days; the calculator displays both the exact and rounded durations.
| Input | Purpose |
|---|---|
| Total project quantity | Measured or required amount |
| Crew size | People assigned to the crew |
| Hours per workday | Scheduled productive time |
| Productivity per worker-hour | Field or rated production per hour |
| Expected efficiency | Planning adjustment to observed output |