Enter the call arrival rate (calls/min) and the average call-holding time (min) into the Calculator. The calculator will evaluate the Erlang Loss Formula.

## Erlang Loss Formula

E = l * h

Variables:

- E is the Erlang Loss Formula (calls)
- l is the call arrival rate (calls/min)
- h is the average call-holding time (min)

To calculate the calls from the Erland Loss Formula, multiply the call arrival rate by the average call-holding time.

## How to Calculate Calls From Erlang Loss Formula?

The following steps outline how to calculate the calls from the Erlang Loss Formula.

- First, determine the call arrival rate (calls/min).
- Next, determine the average call-holding time (min).
- Next, gather the formula from above = E = l * h.
- Finally, calculate the Erlang Loss Formula.
- 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.

call arrival rate (calls/min) = 200

average call-holding time (min) = 100