Business Calculator Methodology

Business Calculator Methodology


Natural gas:

The average carbon dioxide coefficient of natural gas is 0.0549 kg CO2 per cubic foot (EIA 2019c). The fraction oxidized to CO2 is 100 percent (IPCC 2006) therefore .0000549 mT of CO2 per cubic foot of natural gas therefore .00549 mT per 100 cubic feet of natural gas

Fuel Oil:

The average carbon dioxide coefficient of distillate fuel oil is 429.61 kg CO2 per 42-gallon barrel (EPA 2018). The fraction oxidized to CO2 is 100 percent (IPCC 2006) Therefore 10.227 kg of CO2 per gallon Therefore .010227 mT of CO2 per gallon.

Where data for a specific building was not available we used data for “All Buildings”.


Emission factors by fuel type  
Fuel typeEmission factorSource
Propane/LPG5.79kg CO2/galWRI Table 10
 0.00012771kg CH4/lWRI Table 2
 2.5542E-06kg N2O/lWRI Table 3

Fleet Vehicles:

 Emission factors(WRI Tables 10 for CO2 and Table 12 for CH4 & N2O)
Type of Vehiclekg CO2/galg CH4/mig N2O/mi
Hybrid Car**8.810.01470.0079
Pickup Truck/ SUV/ Van8.810.01570.0101
Delivery Truck10.150.00510.0048
Semi-Trailer/ Big-Rig10.150.00510.0048

Rental Cars:

The average rental car is driven 100 miles per day according to

Emissions factor is .000392 mT of CO2 per pass mile (WRI tables 12 & 16)


The average server uses 7466 kwH per year


Air travel:

Greenhouse Gas Protocol & Scopes: 

What is GHG Protocol?

GHG Protocol establishes comprehensive global standardized frameworks to measure and manage greenhouse gas (GHG) emissions from private and public sector operations, value chains and mitigation actions.

Building on a 20-year partnership between World Resources Institute (WRI) and the World Business Council for Sustainable Development (WBCSD), GHG Protocol works with governments, industry associations, NGOs, businesses and other organizations.

Within the Greenhouse Gas Protocols, scopes have been established for categorizing greenhouse gas emissions from businesses. 

Scope 1: Direct emissions from sources owned or controlled by the business

Examples include fuel for owned vehicles, natural gas use, or onsite stationary combustion such as a generator.

Scope 2: Indirect emissions from purchased electricity

Scope 3: Indirect upstream and downstream emissions from sources not owned or controlled by the company

Examples include air travel, waste, purchased goods, end of life treatment of a product etc. 

For more information on scopes and the Greenhouse Gas Protocols, please visit