Free Job Duration Calculator
Estimate how long a job or project will take based on total work hours, number of workers, and hours per day. Plan schedules and set deadlines.
hours
hours
Working Days Needed
7
Weeks Needed (5-day weeks)1.4
Hours Per Worker50.0 hours
Working Days Needed vs Total Work Hours Needed
How to Calculate Job Duration
Formula
Days Needed = Total Work Hours / (Number of Workers x Hours Per Day)
This gives you the minimum calendar days required. In practice, add buffer time for weather delays, material availability, inspections, and other interruptions.
Example Calculation
A project requires 200 work-hours with 4 workers working 8 hours per day.
- 01Daily crew output = 4 workers x 8 hours = 32 hours/day
- 02Days needed = 200 / 32 = 6.25, rounded up to 7 days
- 03Weeks needed = 7 / 5 = 1.4 weeks
- 04Hours per worker = 200 / 4 = 50 hours
Frequently Asked Questions
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