NBS Guide: Embodied Carbon Calculations

The NBS Guide to Embodied Carbon Calculations helps designers, specifiers, sustainability professionals and manufacturers take a more consistent approach to embodied carbon assessment.

It sets out a clear, repeatable method for calculating embodied carbon and explains how the approach can be applied across different BIM object types, from individual materials to assemblies such as wall build-ups and more complex multi-material systems.

For specifiers and project teams, the guide helps make carbon information easier to interpret and apply during design. For manufacturers, it provides useful guidance on how product carbon data can be structured and presented so that it can be used more effectively within digital design and assessment workflows.

The guide also explains the importance of clear assumptions, declared units and recognised data sources in producing transparent and credible carbon calculations.