Rocky Mountain Institute is seeking to help architects, designers and engineers create carbon neutral buildings with the launch of Green Footstep, a new, free, online carbon calculator for reducing carbon emissions. Online at, the calculator allows users to assess their design’s total carbon footprint including site development, construction, and operation; set carbon emissions goals; and explore options to meet Architecture 2030 Challenge targets.

The calculator can be used for both residential and commercial new and retrofit projects. Used at the beginning of a project, the tool can set carbon goals, identify principals to meet the goals, and test different design decisions to see how they impact greenhouse gas emissions. The tool also can be used throughout a project to measure the impact of design changes against original targets.

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