01
Upload a typical week
Use a CSV containing day, interval, interval length and demand. A built-in example lets you explore the tool first.
Free Planning Tool
Erlang Capacity Formula Generator
See how demand across a typical week translates into the people you need, then create a capacity formula you can use in your wider planning.
What It Does
Turn a familiar demand profile into a usable staffing curve.
Erlang calculations are useful at interval level, but longer-range plans often need a simpler relationship between demand and workforce. This tool uses the shape of your typical week to bridge that gap.
It calculates the staffing required at each interval, builds a capacity curve across a range of weekly demand levels and fits a formula that can be carried into a spreadsheet or planning model.
Best used for: inbound voice demand where arrival patterns, handling time and a service-level target are meaningful planning inputs.
Three Simple Steps
Use your data, check the assumptions and export the result.
02
Set your planning assumptions
Add average handling time, service and answer-time targets, plus productive hours per FTE.
03
Review and export
See the interval requirement, capacity curve and fitted formula, then take the formula into your wider plan.
What You Need
A representative week and a few clear service assumptions.
Demand data
One representative week of interval-level voice demand, using a consistent interval length.
Service assumptions
Average handling time, target service level and the target time in which calls should be answered.
Workforce assumption
The productive hours one FTE contributes in a week, so workload can be expressed as a workforce requirement.
Important limitation
The result reflects the week and assumptions supplied. It does not account for every operational constraint, shrinkage choice or channel type.
Questions
Before you use the tool.
No account is needed and the tool opens with example data, so you can see how it works before uploading anything.
Who is the Erlang capacity tool for?
It is for contact-centre planners who need to translate inbound voice demand into a staffing requirement for capacity or budget planning.
What format does my data need to be in?
Use a UTF-8 CSV with day, interval, interval_minutes and demand columns. All rows should use the same interval length.
Is my uploaded data retained?
No. Your upload is processed in memory during the session and is not stored by the tool.
Can I use the formula as a final staffing decision?
Treat it as a planning aid. Check that the input week is representative and review the assumptions, shrinkage and operating constraints before making a staffing or financial decision.
Ready to Try It?
Create your Erlang capacity formula.
The interactive tool opens on the Contact Dynamics tools site. It is free and requires no account.