Available Scope 3 Emissions Features
Missing Scope 3 Emissions Features
Pricing
Starting Price
Options
- Annual Subscription
Available Since
Deployment Options
Good Option For
- Freelancers (1 person company)
- Microbusiness (2-10 people)
- Small Business (11-50 people)
- Medium Business (51-250 people)
- Large Business (250+ people)
Deep dive
Core Features
The GZA Scope 3 Calculator combines expenditure-based emissions calculations, activity data, and automated analysis within a Microsoft Excel workbook.
Scope 3 Emissions Calculation: Covers all eight upstream Scope 3 categories and three downstream categories: downstream leased assets, franchises, and investments. Calculations follow methodologies aligned with the GHG Protocol Corporate Value Chain (Scope 3) Standard.
Supply Chain Emissions Factors: Uses the US EPA's Environmentally-Extended Input-Output (USEEIO) model, covering 411 goods and services. Expenditure-based factors are adjusted for inflation and US electricity grid decarbonization, enabling organizations to estimate emissions associated with purchases and supply chain activities.
Employee Commuting Assessment: Estimates commuting emissions using employee headcounts, work schedules, average travel distances, and vehicle emissions data. The underlying reference information draws on more than 25 sources covering over 50 countries.
Leased Assets and Franchise Calculations: Estimates building-related emissions using energy intensity benchmarks for different countries, climate zones, and property types.
Investment Emissions Assessment: Estimates financed emissions associated with equity and debt investments using expenditure-based emissions factors. Calculations consider investment revenue, ownership stakes, and the estimated Scope 1, Scope 2, and upstream Scope 3 emissions of investees.
Emissions Hotspot Analysis and Reporting: Automatically generates Scope 3 emissions summaries, charts, and supplier-level hotspot analyses. Users can identify major emitting industries, compare emissions across categories, and review the underlying emissions factors, assumptions, and calculation methodologies.
Closing Insights
Developed by GZA's sustainability consulting team, the Scope 3 Calculator offers an alternative to subscription-based carbon accounting platforms. Its Excel format allows organizations to conduct assessments offline without connecting to external databases or sharing commercially sensitive information with third parties.
GZA reports that more than 600 companies, municipalities, institutions, and other organizations worldwide have used the calculator. Its customer base includes Fortune 20–500 companies. The tool can support GHG inventories prepared for initiatives such as CDP and SBTi, subject to their applicable reporting requirements.
The latest V3.0 release expands coverage to selected downstream emissions categories. However, four downstream categories remain unsupported, and the calculator's reliance on secondary data makes it better suited to initial assessments than to detailed supplier-specific inventories.
GZA offers a free preview version and a full version priced at US$5,000, supplied with a commodity lookup workbook. Organizations requiring additional methodological support can also draw on GZA's sustainability consulting services.