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Calculations

How to Calculate Scope 2 Emissions

Step-by-Step Process

  1. 1

    Gather electricity bills for the reporting period

  2. 2

    Sum total kWh consumption

  3. 3

    Apply UK grid average factor (location-based method)

  4. 4

    Convert kg CO2e to tonnes CO2e

  5. 5

    Disclose methodology (location-based mandatory, market-based optional)

Key Formulas

Electricity (kWh) × Grid Factor = kg CO2eGrid factor ~0.2 kg CO2e/kWh (varies yearly)

Common Mistakes to Avoid

  • Using supplier 'green' factors instead of grid average for SECR
  • Missing half-hourly data if available
  • Not including landlord-supplied electricity
  • Wrong time period (calendar vs financial year)

Tools & Resources

  • Electricity bills
  • Smart meter data
  • AMR readings
  • Landlord invoices

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