Scope 2 Emissions Calculator

What are Scope 2 Emissions?

Scope 2 emissions are indirect emissions from the generation of purchased electricity, steam, heating, and cooling consumed by the reporting organization. For most commercial and office-based organizations, electricity consumption is the largest single source of GHG emissions.

The GHG Protocol requires dual reporting: location-based (using regional average grid emission factors) and market-based (reflecting specific electricity contracts, RECs, or green tariffs). This dual approach allows organizations to demonstrate both their physical impact and their procurement decisions.

Grid emission factors vary dramatically by country and region, reflecting the energy generation mix. Nuclear and renewable-heavy grids (France, Norway, Sweden) have very low factors (<100 g/kWh), while coal-dependent grids (India, Poland, South Africa) have high factors (>600 g/kWh).

Formula: Scope 2 (location-based) = Electricity (kWh) × Grid EF (kg CO₂/kWh) Scope 2 (market-based) = Electricity × Supplier-specific EF If 100% renewable energy is procured: market-based Scope 2 = 0

Example Calculation

A company in Germany uses 1,000,000 kWh/yr. Location-based: 1,000,000 × 0.350 = 350 tonnes CO₂. The company purchases 50% renewable electricity: market-based = 500,000 × 0.350 + 500,000 × 0 = 175 tonnes CO₂.

When to Use This Calculator

• Calculating your organization's Scope 2 emissions for annual sustainability reporting using location-based grid emission factors
• Evaluating the emissions reduction potential of switching to renewable electricity tariffs or purchasing RECs
• Comparing Scope 2 emissions across facilities in different countries or grid regions to identify reduction opportunities
• Modeling the impact of energy efficiency projects on Scope 2 emissions by reducing electricity consumption

Common Mistakes to Avoid

• Using a national average grid factor when a more specific regional or utility factor is available — sub-national factors can differ by 50% or more, especially in large countries like the US
• Reporting only market-based Scope 2 (which may be zero with RECs) without also disclosing location-based Scope 2 — the GHG Protocol requires dual reporting
• Applying last year's grid factor to this year's data without checking for updates — grid factors change annually as the generation mix evolves
• Forgetting to include emissions from purchased steam, heating, and cooling — Scope 2 is not limited to electricity; any purchased energy carrier counts

Related Standards & References

• GHG Protocol Scope 2 Guidance — Detailed requirements for dual reporting (location-based and market-based) of indirect electricity emissions
• ISO 14064-1 — International standard for quantification and reporting of GHG emissions, including indirect energy emissions
• RE100 Technical Criteria — Requirements for credible 100% renewable electricity procurement claims

Frequently Asked Questions

What is the difference between location-based and market-based?

Location-based uses the average grid emission factor for your physical location, reflecting the actual grid mix. Market-based reflects your contractual purchasing choices — buying renewable energy certificates, power purchase agreements, or green tariffs. A company can have zero market-based Scope 2 while still having significant location-based emissions.

Do Renewable Energy Certificates (RECs) eliminate Scope 2?

Under market-based accounting, yes — purchasing RECs matching your consumption allows reporting zero Scope 2. However, quality matters: bundled RECs (from a specific project, matched temporally and geographically) are preferred over unbundled RECs. Some frameworks (like RE100) have specific criteria for REC quality.

How often are grid emission factors updated?

Grid emission factors are typically updated annually by national agencies (EPA eGRID for the US, EEA for the EU, DEFRA for the UK). Use the most recent factors available for your reporting year. Factors can change significantly year-to-year as grids add renewable capacity — for example, the UK grid factor dropped from 500 to 200 g CO₂/kWh between 2012 and 2022 due to coal phase-out.