Measure Scope 1, Scope 2, and all Scope 3 categories. No credit card. No downloads.
Complete Scope 1, 2, and 3 coverage
Instant CO2e results by category
No technical expertise required
Enter your details to access the calculator
Use our free online carbon calculator to quantify every major emission source with instant CO2e results
Stationary combustion and mobile fleets, refrigerants by type and top-ups
Purchased electricity by site or utility bill, market and location-based views
Complete value chain coverage including purchased goods, transport, waste, business travel, and more
Built for organizations and professionals who need accurate, comprehensive carbon footprint estimates
Get a complete view of your carbon footprint without enterprise-level complexity or cost. Start measuring your impact today.
Need complete Scope coverage before formal reporting? Quickly establish baselines and identify emission hotspots across your organization.
Prepare baselines and pre-assessments for your clients quickly. Move from initial estimates to comprehensive footprint analysis efficiently.
Start with the free calculator, upgrade to North Star Lite when you need to save data and generate reports
Free results are not saved and not downloadable. To save data, collaborate with your team, and pull audit-ready reports, upgrade to North Star Lite for $150 per month (per user).
Everything you need to know about our free GHG calculator
Yes. It is built for organizations and consultants. It covers Scope 1, Scope 2, and all 15 Scope 3 categories, providing a comprehensive view of your company’s greenhouse gas emissions.
No. The free version does not save data and results are not downloadable. This makes it perfect for quick estimates and exploring emission sources. To save data, collaborate with team members, and export audit-ready reports, upgrade to North Star Lite for $150 per month (per user).
All fifteen Scope 3 categories are included: Purchased goods and services, capital goods, fuel and energy related activities, upstream transport and distribution, waste generated in operations, business travel, employee commuting, upstream leased assets, downstream transport and distribution, processing of sold products, use of sold products, end-of-life treatment of sold products, downstream leased assets, franchises, and investments.
Use the free calculator for a fast, complete estimate across all Scopes. It’s ideal for initial assessments and understanding your emission profile. For full GHG accounting with documentation, versioning, team collaboration, and official reporting capabilities, upgrade to North Star Lite.
Start with the free calculator to explore your emissions. When you’re ready to save data, track progress over time, invite team members, and export audit-ready reports, upgrade to North Star Lite for $150 per month (per user) directly from the results screen.
The calculator accepts flexible data inputs including spend amounts, quantities, distances, weights, energy consumption, or activity data – whatever you have available. This makes it easy to estimate emissions using your existing business records and utility bills.
