What Is the Man-Hours Calculator?
A man-hour (also called a person-hour) is the amount of work performed by one worker in one hour. This calculator gives you the total man-hours required for a task or project by combining the number of workers with the hours each worker puts in. It is a universal measure used in project management, construction, manufacturing, and labor cost estimation.
How to Use It
Enter the number of workers assigned to the job and the number of hours each worker works. Click calculate and the tool returns the total man-hours. This figure is useful for scheduling, comparing crew sizes, estimating wages, and tracking productivity.
The Formula Explained
The calculation is straightforward multiplication:
$$\text{Man-Hours} = \text{Number of Workers} \times \text{Hours Worked per Worker}$$
If different workers log different hours, sum each worker's hours individually, or use the average hours per worker for an estimate.
Worked Example
Suppose a crew of 12 workers each works an 8-hour shift. The total man-hours equal \(12 \times 8 = 96\) man-hours. If you knew the project required 480 man-hours total, you could then estimate it would take \(480 \div 96 = 5\) such days to complete.
FAQ
What is the difference between man-hours and hours? One hour of elapsed time can represent many man-hours if multiple people work simultaneously. Five workers for one hour equals five man-hours but only one clock-hour.
How do I convert man-hours to man-days? Divide total man-hours by the length of a standard workday (often 8 hours). \(96 \div 8 = 12\) man-days.
Can I use fractional hours? Yes. Enter decimal values such as 7.5 hours to reflect partial shifts or break time.
