The BPMSG diversity online calculater allows you to calculate diversity indices from your sample input data. Select the number of categories or classes (between 2 and 20) and input your sample data (e.g. observations) as integer or decimal numbers for each category or class.
As a result you will get the Shannon entropy, Shannon equitability, true diversity (number equivalent of Shannon entropy), Berger-Parker index, Simpson dominance, Gini-Simpson index and Simpson equitability.
You might also download an excel template for this calculation. Find more information and videos about the concept of diversity as business KPI.