About EstimateS

EstimateS is a free software application for Windows and Macintosh operating systems that computes a variety of biodiversity functions, estimators, and indices based on biotic sampling data. Some features require species relative abundance data, others only species presence/absence data. A comprehensive User's Guide is available online at this site.

Major Features of EstimateS8

Rarefaction and species accumulation curves

Species richness estimators and diversity indices

Shared species estimation and biotic similarity indices, with estimators

Importing data and exporting results


Two versions of EstimateS are currently offered, to allow users with older operating systems to continue using EstimateS. Unless you need to use Version 7.5.2 for this reason, Version 8.0.0 is recommended. All known bugs are corrected in both versions.

Who Uses EstimateS?

Between 1997 and 2006, EstimateS was downloaded by more than 20,000 users in more than 100 countries around the globe. They use EstS in conservation biology, biotic inventories, natural area assesssment and monitoring, biogeography, macroecology, microbial ecology, molecular biology, ethnobotany and many other fields. You can get an idea of the diversity of uses by scanning the titles of the references that appear below.

Publications That Cite EstimateS

As of July, 2004, a total of 237 publications are known to have cited EstimateS. If have cited EstS in a published work that is not in the list, and you would be willing to have it included, please contact Robert K. Colwell with details. Click here for the list of publications. (This list will be periodically updated.)