While most i-Tree tools are available through your web browser, i-Tree Eco and i-Tree Hydro are Windows apps that must be downloaded and installed:

  1. From your Windows computer, begin the download here: Attention! A new version of i-Tree Eco will be posted soon. It will move off the original, MS Access database to an SQLite version. PLEASE check back in early August.
  2. Please fill out our basic demographic information form; we do not share your information.
  3. You will receive a download link via email that will launch a Windows Installer for i-Tree Eco, Hydro, Streets (optional), plus shortcuts to web based tools.

Don't want to download or install?

Troubleshooting the download process:

  • We collect basic demographic information about our users to assess interest in i-Tree to keep it funded. Your help is crucial!
  • Please make sure your spam filters allow email from
  • Please check your junk mail folder if the email is late in arriving.
  • If you have trouble saving the download AFTER clicking on the emailed link, temporarily disable Controlled Folders Access in Windows.
  • Note to previous i-Tree users: i-Tree accounts are no longer needed.

Help with installation:

Thank you for your interest in i-Tree! We update our science and software throughout the year, so please check back often.