Corporate Carbon Footprint (Scope 1, 2 & 3 GHG Protocol

Corporate Sustainability & ESG Disclosures: GHG Protocol Scopes

The Greenhouse Gas (GHG) Protocol establishes the international standard for corporate carbon footprint accounting:

• Scope 1 (Direct Emissions): Emissions from company-owned assets (onsite boilers, natural gas heaters, company-owned vehicle fleets).

• Scope 2 (Indirect Emissions from Purchased Energy): Emissions associated with generation of purchased electricity, steam, heating, and cooling consumed by the reporting company.

• Scope 3 (Value Chain Emissions): Upstream and downstream emissions across the supply chain, including purchased goods and services, employee business travel, commuting, waste disposal, and end-of-life product treatment (typically representing 70%–90% of total footprint).

How to Use This Calculator

Enter your Scope 1: Natural Gas Combustion (Therms / year) (e.g. 12,000), Scope 1: Fleet Fuel Consumption (Gallons / year) (e.g. 8,500 (Gasoline & Diesel)), Scope 2: Purchased Grid Electricity (kWh / year) (e.g. 350,000), Scope 2: Grid Carbon Intensity (lbs CO2e / kWh) (e.g. 0.85 (US eGRID national avg: ~0.85 lbs/kWh)), Scope 3: Purchased Goods & Services Spend ( / year) (e.g. 450,000), and Scope 3: Commercial Air Travel (Passenger Miles / year) (e.g. 85,000). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

GHG Protocol Corporate Standard \& Carbon Accounting equations:

Scope 1 (tCO_2e) = (Therms Gas × 0.005302) + (Gallons Fuel × 0.008887)

Scope 2 (tCO_2e) = (Purchased Electricity (kWh) × Grid Factor (lbs CO_2e/kWh)) / (2,204.6226)

Scope 3 (tCO_2e) = (Supply Chain Spend (\) × 0.00032) + (Air Passenger Miles × 0.00015)

Total Corporate Footprint = Scope 1 + Scope 2 + Scope 3

Carbon Offset Valuation = Total tCO_2e × Offset Price (\/ton)

Worked Example

For example, evaluating an enterprise consuming 12,000 therms natural gas (63.62 tCO_2e), 8,500 gallons fleet fuel), purchasing 350,000 kWh grid electricity at , and \450,000.00 in vendor spend with 85,000 flight miles): The Total Enterprise Carbon Footprint is \, requiring \10,771.00/year to offset or 7,122 tree seedlings.

Understanding Your Result

Automotive benchmarks for reference: engine displacement affects power density (target 100+ hp/liter for performance), power-to-weight ratio above 0.1 hp/lb is considered sporty. Tire sizing: the middle number (e.g., 60 in 225/60R17) is the aspect ratio — lower numbers indicate sportier, wider tires with less cushioning. Braking distance from 60 mph: average car 120–140 ft on dry pavement; wet roads add 40–60%. Fuel efficiency varies significantly by driving style — aggressive acceleration and braking can reduce MPG by 15–30%.