COVID-19 info for December 2021: We're still open online! We continue to make occasional adjustments to order fulfillment to accommodate local health regulations and supply chain issues. We now accept PayPal, major credit cards and Venmo (via PayPal) for all online and telephone orders, but we had to permanently discontinue in-store pickups, replacing them with free expedited domestic shipping on art prints. Orders are fulfilled on schedule by us or directly through our manufacturing partners, but some minor delays may occur throughout the holiday season.

Biodiversity Calculator

This calculator is free to use and is designed for biologists, ecologists, teachers, and students needing to quickly calculate the biodiversity indexes of an ecosystem. First, enter the number of species, and then enter the name you wish to give the species, if available, and the given populations for each of the species—in any given order. The script will return the Simpson and Shannon-Wiener values (among almost two dozen others) for the given data. If you would like to request any features for the calculator or make any other comments about it, please contact us.

Formulas and methods calculated

  • Shannon Index (sometimes Shannon-Wiener or Shannon-Weaver)
  • Simpson Index
  • Dominance Index
  • Reciprocal Index
  • Berger-Parker Dominance
  • Margalef Richness
  • Menhinick Index
  • Rényi Index
  • Gini Coefficient
  • Buzas and Gibson's Index
  • Equitability Index
  • Hill Numbers
  • Whittaker Index
  • Sørensen's Index
  • Routledge beta-R Index
  • Jaccard Index
  • Mountford Index
  • Bray curtis
  • Gamma Diversity
  • Preston Diagrams
  • Lorenz Curves
  • Rarefaction Curves
See a sample output