The formula to calculate man days from man hours is:
\[ \text{MD} = \frac{\text{MH}}{8} \]
Where:
Man days is a conversion metric used in project management to estimate the amount of work or effort required to complete a task. It is based on the concept that a man day represents the amount of work one person can accomplish in an eight-hour workday, while a man hour represents the amount of work one person can accomplish in one hour.
Example:
Calculation:
\[ \text{MD} = \frac{40}{8} = 5 \text{ days} \]