Carbon emissions calculation tool
A tool to calculate carbon emissions for operational, construction and maintenance activities undertaken on behalf of National Highways.

We’ve published our Net Zero Plans for 2030, 2040 and 2050. To meet the target for 2040 under maintenance and construction, we're dedicated to achieving the target set for Performance Indicator 4.5, which relates to reducing supply chain carbon emissions.
To meet this target, suppliers must report on the carbon associated with activities undertaken on our behalf. They can do this by downloading a new version of our Carbon Tool and completing it on a monthly basis for Major Projects, or a quarterly basis for Operations and DBFOs. They should do this each time they submit a return.
On completion, suppliers must generate an export file using the Carbon Tool, and send the export file, the completed Carbon Tool and any queries to the Carbon Reporting team.
Area-based contracts should co-ordinate the receipt of carbon returns from subcontractors before submission.
The Carbon Tool guidance below shows suppliers how to use the tool. It's also important that suppliers refer to the e-learning package.
Are you a supplier who needs more help with their carbon returns? A comprehensive set of guidance, tools and resources, including a series of 'how to' videos for using the Carbon Tool is available on our Carbon Hub.