Enter the peak hour factor and the peak 15 minute flow into the Peak Hour Volume Calculator. The calculator will evaluate the Peak Hour Volume.

## Peak Hour Volume Formula

The following two example problems outline the steps and information needed to calculate the Peak Hour Volume.

PHV = PHR * 4 * P15

Variables:

- PHV is the Peak Hour Volume (units/hr)
- PHR is the peak hour factor
- P15 is the peak 15 minute flow

To calculate the peak hour volume, multiply the peak hour factor by 4, then multiply again by the peak 15 minute flow.

## How to Calculate Peak Hour Volume?

The following steps outline how to calculate the Peak Hour Volume.

- First, determine the peak hour factor.
- Next, determine the peak 15 minute flow.
- Next, gather the formula from above = PHV = PHR * 4 * P15.
- Finally, calculate the Peak Hour Volume.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

peak hour factor = .75

peak 15 minute flow = 15

PHV = PHR * 4 * P15** **= ?