There are five Business Travel calculation methods for journey-related emissions to choose from, three calculation methods for accommodation-related emissions, and two calculation methods for parking-related emissions (all including Bring Your Own Emissions).
Whilst calculating journey-related emissions is mandatory under the GHG protocol, accommodation and parking-related calculation methods can be used in addition, in order to gain a comprehensive picture of your Business Travel emissions.
Journey-related calculation methods:
Distance travelled uses the distance travelled per mode of transport, numbers of travellers, and travel class. This is our recommended calculation method for travel as it provides the most accurate results.
Long- vs. short-haul travels uses the number of long- and short-haul trips per mode of transport.
Spend uses the business travel expenditure and the travel type to calculate emissions. Accommodation and parking-related emissions can also be calculated using this calculation method.
Origin and destination of travels uses the starting and ending location of flight, train and car trips.
Bring Your Own Emissions allows you to upload your own pre-calculated emissions to the Plan A platform. For more information, see here.
Accommodation-related calculation methods:
Accommodation uses accommodation type, number of nights, and number of rooms.
Spend uses accommodation-related expenditure to calculate emissions. Journey and parking-related emissions can also be calculated using this calculation method.
Bring Your Own Emissions allows you to upload your own pre-calculated emissions to the Plan A platform. For more information, see here.
Parking-related calculation methods:
Spend uses parking-related expenditure to calculate emissions. Journey and accommodation-related emissions can also be calculated using this calculation method.
Bring Your Own Emissions allows you to upload your own pre-calculated emissions to the Plan A platform. For more information, see here.
We recommend calculation methods based on their accuracy but ultimately you should choose a calculation method that fits the data you have access to.
For more information on how to choose a calculation method, read the Choose a Calculation Method article.