Erlang Calculator for Excel

The Erlang Calculator provides the full suite of custom functions for contact centers, including Erlang X, Chat, Blending, and more!

Calculate capacity using this most efficient, powerful, and versatile tool, which is unmatched in the market. Improve accuracy, optimize your workflow and save resources based on the forecast.

Start your one-week free trial now!

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Includes functions for:
  • Erlang X 
  • Erlang Chat
  • Blending 
  • Erlang C

With parameters such as Occupancy, Service Level, ASA, Abandonment, Patience, Redials, Concurrency, AHT, and Forecast.

Screenshot add-in Erlang blending function
Erlang C and X calculator Excel

Before installing this add-in, make sure you have a Microsoft 365 license with at least the following versions:

  • Windows: 16.0.12527 or up
  • Mac: 16.34 or up
  • Web: May 2019 or up

Note that some companies restrict the use of add-ins. Please get in touch with your administrator or use a different Microsoft 365 account to install the add-in.

Learn more and Get started!

Before starting, it is wise to understand Erlang thoroughly and know how to use it correctly. Therefore, we recommend you read our blog on Erlang97 and watch our webinars on Erlang and Capacity calculations, Erlang C, and Chat Capacity Calculations. These will familiarize you with Erlang’s formulas, parameters, limitations, and practical application as a workforce management professional in any contact center.

To get started and gain the most out of the Erlang Calculator for Excel, read our manual and FAQ. This can also be used to troubleshoot and expand your knowledge about Erlang in contact centers.

Licensing and Pricing

Please be aware that our Basic and Premium licenses are intended for individual use. Payment processing is seamless, with automatic invoicing and payment confirmations generated via our payment provider.

The Enterprise license is offered to businesses, providing customized invoicing and a set of additional features, detailed below. It may also be the preferred option if you lack access to Microsoft 365 or if external add-ins are blocked, which can occur with certain work or school mail domains. To manage your Enterprise license, please check your License Overview.



Or €49.95 per year

Erlang X
Erlang C
Extensive manual


Or €99.95 per year

All Basic features plus:
Erlang Chat
Email Support

Contact us

For more information

All Premium features plus:
Local Version
Even faster Performance
Unlimited Phone and IT support

Do you prefer working in Python, or R?

For beginners or those seeking a basic solution, our Excel add-in offers a user-friendly entry point. However, for those ready to take their contact center to the next level, Python and R provide unparalleled capabilities and flexibility.

Python and R provide superior efficiency for handling large data volumes and achieving faster processing speeds compared to Excel.