WFM Helper
Back to ToolsWorkforce Management Tools

Free Erlang C Staffing Calculator

Calculate the exact number of agents you need, instantly, no signup.

Interval inputs

Results update live as you type.

calls

Contacts arriving in the interval

sec

Talk time + after-call work

%
sec
x

1.0 keeps your entered volume unchanged

%

Breaks, training, absence, meetings

Required Agents
39agents
Staff to Schedule
56with shrinkage
Achieved Service Level
84.2%
Average Speed of Answer
10.8sec
Occupancy
85.5%
Traffic Intensity
33.33erlangs

About 25.4% of contacts will have to wait in queue with 39 agents handling calls.

Save or share these results

Take a snapshot of the exact inputs and outputs on screen.

Email me these results

Get the full Excel/VBA version

Want the full Excel/VBA version with live formulas, RTM tracking, and dashboards? Pay what you think it's worth.

Suggested ₹99 · pay what it's worth to you

Results are estimates for planning purposes only and should not replace professional workforce management judgment.

More tools

Explore the rest of the WFM Helper toolkit, or read about the site.