The Erlang B Calculator is based on the Erlang B traffic model and is used to work out how many lines are required on a trunk group if the traffic and the required grade of service are known. Unlike similar products, you can also carry out these calculations in reverse. For example, you can find out what the probability of blocking would be for a given busy hour traffic figure and trunk group size. If you know two of the variables, you can work out the third.
The Erlang B Calculator supports calculations involving busy hour figures dimensioned in both Erlangs and C.C.S.