Embodied Carbon Calculator for Building Materials (A1–A3)

Estimate the cradle-to-gate embodied carbon of concrete, steel, wood, masonry, glass and insulation from industry-average EPDs.

Concrete by strength, structural steel, rebar, deck, lumber, glulam, CMU, brick, glass, aluminum, gypsum and insulation
Quantities in the units you take off: cubic yards, tons, board feet, square feet
Factors from North American industry-wide EPDs and CLF 2023 baselines, with the source of each
Totals by category and carbon intensity per floor area
Imports the volume from an open Concrete Calculator

How to use

Pick a material on each row and enter the quantity in the unit shown. Insulation also takes its R-value, since thicker insulation carries more carbon.
Add rows with Add material. If a Concrete Calculator is open, From Concrete Calc adds its volume as a row.
Enter the gross floor area to see the carbon intensity, the figure most embodied carbon targets use.
Results are cradle-to-gate (stages A1–A3): extraction, transport to the factory and manufacturing. Wood values leave out the carbon stored in the wood.
Industry averages are a starting point. Use product-specific EPDs (from EC3 or the supplier) for a whole-building LCA or a Buy Clean submission.