You will need
  • The time sheet
To calculate this indicator you need in a timesheets accounting time to calculate the amount of hours worked per day of all employees. For example, the organization employs 10 people. On the day the total amount of their work hours is 80 man-hours per day (10 persons * 8 hours).
Then the resulting number and multiply by the number of working days in the month. Thus, 80 person/hours * 21 days = 1680 man-hours.
It is also possible indices of man-hours to calculate for each employee. For example, if a 5-day working week and 8 hour working day turns: 21 days * 8 hours = 168 man-hours per day. This indicator is convenient to calculate with crazy hours.