Man-Hours Calculator

Your details

Total number of workers on the project.
people
Standard scheduled work hours per worker per day, before breaks.
hrs
Number of working days per week.
days
Total length of the project in weeks.
weeks
Total daily break time per worker (lunch + short breaks). Subtracted from scheduled hours to get effective hours.
hrs
Realistic productivity as a share of effective hours (typical office work: 70-85%; skilled trades: 80-90%). Accounts for minor delays, meetings, and workflow interruptions.
%
Fully-loaded hourly wage for an average worker on this project.
USD
Total overtime hours across all workers for the whole project, beyond standard scheduled hours.
hrs
Overtime rate as a multiple of the base hourly rate (1.5 = time-and-a-half, 2 = double time).
Total man-hours
800hrs

Gross scheduled hours across all workers for the full project

Effective hours700hrs
Productive hours595hrs
Regular labor cost28,000USD
Overtime cost0USD
Total labor cost28,000USD
Cost per worker5,600USD
Cost per productive hour47.06USD
Gross man-hours800
Effective hours700
Productive hours595

800 man-hours over 4 weeks with 5 workers.

  • Out of 800 scheduled man-hours, approximately 595 are genuinely productive (74.4% of gross time).
  • Total labor cost is USD 28,000.00, averaging USD 5600.00 per worker.
  • An efficiency rate of 80-90% is typical for office, technology, and skilled-trade projects with structured workflows.

Next stepCompare your cost-per-productive-hour against market rates to check whether your workforce size and duration are well-optimized.

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