Tally Climate Action Tool (tallyCAT) is a free and open-access Revit plug-in that supports the export of material quantities from Autodesk Revit to EC3 and allows synchronization between them. It is powered by the EC3 database and enables users to select materials based on project needs, assess embodied carbon reduction opportunities, and produce charts and reports from within Revit.

Download Tally Climate Action Tool (tallyCAT) from Autodesk App Store

Download Tally Climate Action Tool (tallyCAT) Community Edition

Tally Climate Action Tool (tallyCAT) gives you a fully functional Embodied Carbon in Construction Calculator (EC3) inside your Revit project.

  • Export material quantities from Revit into EC3

  • Identify each material (concrete, steel, gypsum…)

    • Tally Climate Action Tool (tallyCAT) starts you with a reasonable guess

    • User should refine each material search

  • Evaluate climate impact based on product specific 3rd party verified EPDs.

  • Visualize hot spots and biggest carbon reduction opportunities

  • Generate graphs and reports

  • Synchronize between Revit and the EC3 model in the web

  • Annotate your Revit model & components so you can reuse your work

  • Save libraries of materials and assemblies for future use

Tally Climate Action Tool (tallyCAT) currently supports Revit 2020, 2021, 2022, 2023 and 2024. To install, download the MSI and double-click the file to install it.

We expect Tally Climate Action Tool (tallyCAT) will also be available shortly from the Autodesk app store.

Tally Climate Action Tool (tallyCAT) is in ongoing development by C-Change Labs, Perkins & Will, and BuildingTransparency.

We gratefully acknowledge the financial support of the Province of British Columbia through the Ministry of Energy, Mines and Low Carbon Innovation, which made creation of this tool possible.


You may be familiar with EC3’s purple Report Bugs & Feedback button, but there is a second bug reporting path inside Revit, which helps us troubleshoot issues in the Revit environment. See Report a Bug section for details.

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