Carbon reporting for hotels: What is the Hotel Carbon Measurement Initiative (HCMI)?

The International Tourism Partnership (ITP) and the World Travel & Tourism Council (WTTC) have collaborated on a groundbreaking initiative to unite hotel industry efforts to calculate and communicate carbon impacts by agreeing on a standardised methodology and metrics.The guideline applies the principles of the Greenhouse Gas (GHG) Protocol Corporate Standard at the hotel property level. applies the methodology designed by ITP and WTTC.


Your hotel's carbon footprints in hotelier-friendly metrics, specifically:

  • Solve the current need for responding to client requests for carbon footprint information by defining a common measurement method across the hotel industry globally;
  • Improve how the hotel industry communicates its impacts. Currently, hotels measure their carbon emissions differently which can lead to confusion amongst consumers, particularly corporate clients, looking to understand their own potential carbon footprint and meet their own goals/targets in this area;
  • Improve transparency of carbon reporting by using one common methodology.

The methodology is:
  • Designed to be applied by any hotel around the world (it has been designed in partnership with major hotel groups, however, it applies equally to individual hotels, large and small, regardless of the type of amenities offered);
  • Informed by the GHG Protocol Standards (the most widely used international accounting tool for government and business leaders to understand, quantify, and manage greenhouse gas emissions), with input from consultants KPMG and reviewed by the World Resources Institute;
  • Supported by the industry. Twenty three leading international hotel companies have collaborated to develop HCMI. They are: Accor, Beijing Tourism Group/NUO Hotels, Fairmont Hotels and Resorts, Hilton Worldwide, Hong Kong & Shanghai Hotels, Hyatt Corporation, InterContinental Hotels Group, Mandarin Oriental Hotel Group, Marriott International Inc, Melia Hotels International, MGM Resorts International, Mövenpick Hotels & Resorts, Pan Pacific Hotel Group, Starwood Hotels & Resorts Worldwide, Inc., The Carlson Rezidor Hotel Group, Shangri-la Hotels, The Red Carnation Hotel Collection, The Hong Kong and Shanghai Hotels Ltd., TUI Hotels and Resorts, Whitbread Group,Wyndham Worldwide.


What is is an easy way to measure your carbon emissions and apply the HCMI methodology at a minimal cost.


You may have seen carbon footprint information for hotels from other third parties. These are estimated calculations based on average buildings energy consumption. They are not specific to individual hotels and are not based on a methodology approved by the industry.

At, we incorporated all of the different CO2 emission factors and unit conversion factors so that you don’t have to search for them and update them regularly.

Emission Factors convert activity data (e.g. energy consumption) to greenhouse gas emissions. The Emission Factors used by come from reputable, third party sources such as the Greenhouse Gas Protocol, the International Energy Agency, the Climate Registry, or national agencies such as the US Environment Protection Agency or the UK Department of Energy & Climate Change.

HotelCO2 Green Policy

We try to minimize our impacts on the environment ourselves. Our largest source of emissions come from our hosted servers. The servers we used are covered by certified Wind Renewable Energy Credits (RECs) for 130% of the electricity used for both power and cooling.

There are over 400 ‘green’ schemes around the world. However, HCMI is the only one that has been developed by and for the hotel industry.


"When you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meager and unsatisfactory kind.”

(Lord Kelvin, 1883)