Green Steel Carbon Intensity Calculator

Sum direct, electricity, and optional feedstock emissions, subtract scrap credits, and convert the balance into kilograms of CO₂e per tonne of steel output.

Scope 1 emissions from reduction furnaces, reformers, and other on-site combustion.
Scope 2 emissions based on purchased electricity or captive power plant output.
Saleable crude steel or hot rolled coil tonnage for the same reporting year.
Defaults to 0. Include pellet, DRI, or alloy embodied emissions attributed to production.
Defaults to 0. Enter avoided emissions per tonne when high scrap content displaces virgin production.

Verify emission factors with lifecycle inventories or third-party assurance before publishing sustainability disclosures.

Examples

  • 1.2M t CO₂e direct + 0.45M t CO₂e electricity + 0.3M t feedstock − 150 kg scrap credit over 5M tonnes ⇒ 240 kg CO₂e/t
  • 0.9M t CO₂e direct + 0.32M t CO₂e electricity over 4.2M tonnes, no extras ⇒ 290.48 kg CO₂e/t

FAQ

How should I estimate electricity emissions?

Multiply site electricity consumption by the grid intensity for the relevant balancing authority or captive plant fuel mix. Time-matching improves accuracy when using renewable PPAs.

What if my facility co-produces direct reduced iron and steel?

Allocate emissions to each product based on energy use or mass balance before entering the steel-only portion into the calculator.

Can I enter negative scrap credits?

If recycled content increases emissions due to re-melting losses, leave the credit at zero and document the rationale separately instead of entering a negative value.

Does this align with the EU CBAM requirements?

Yes—reporting requires per-tonne intensities that include direct and indirect emissions. Maintain auditable source data as explained in the EU CBAM liability walkthrough.

Additional Information

  • Intensity is expressed in kilograms of CO₂e per tonne of crude steel for alignment with GHG Protocol guidance.
  • Feedstock embodied emissions cover upstream mining, pelletising, or purchased DRI shipments attributable to the site.
  • Scrap credits approximate the avoided emissions from substituting recycled content for virgin production.

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