--- title: Energy - How to use Emission Factors description: Energy - How to use Emission Factors --- [Skip to content](https://support.worldly.io/hc/en-us/articles/29393231795995-energy-how-to-use-emission-factors#main-content) English Show submenu for translations [Submit a request](https://support.worldly.io/kb-tickets/new?hsLang=en) [![Worldly logo](https://support.worldly.io/hs-fs/hubfs/Worldly%20Media%20Kit/Worldly%20Logos/Worldly_LogoTM_Red.png?width=250&height=61&name=Worldly_LogoTM_Red.png)](https://www.worldly.io/) Open main navigation Close main navigation - English Show submenu for translations - [Submit a request](https://support.worldly.io/kb-tickets/new) How can we help? - There are no suggestions because the search field is empty. 1. [Help Center](https://support.worldly.io/?hsLang=en) 2. [Facility Data Manager (FDM)](https://support.worldly.io/facility-data-manager-fdm?hsLang=en) 3. [Energy](https://support.worldly.io/facility-data-manager-fdm?hsLang=en#energy) # Energy - How to use Emission Factors EFs are multiplied by the corresponding activity data to estimate emissions. According to the [Greenhouse Gas Management Institute](https://ghginstitute.org/2022/10/31/what-are-emission-factors-and-where-can-i-find-them/#:~:text=The%20basic%20formula%20is), the basic formula is:   Activity Data x Emission Factor = GHG Emissions   The units associated with the Activity Data must be converted to match the units used by the EF to calculate the estimated GHG Emissions.    ## **Higg FEM 2025 GHG and Energy Comparability Guidance** [Click here](https://howtohigg.cascale.org/wp-content/uploads/2025/09/GHG-and-Energy-Comparability-Notes-for-FEM-2025.pdf) to learn more about the comparability between the Higg FEM 2024 and Higg FEM 2025 energy usage and GHG emissions models. [![Worldly logo](https://support.worldly.io/hs-fs/hubfs/Worldly%20Media%20Kit/Worldly%20Logos/Worldly_LogoTM_Red.png?width=120&height=30&name=Worldly_LogoTM_Red.png "Worldly logo")](https://www.worldly.io) © 2026 Worldly. All Rights Reserved [Terms of use](https://worldly.io/terms-of-use/)  |  [DPA](https://worldly.io/data-privacy-addendum/)  |  [Privacy Policy](https://worldly.io/privacy-policy/)  |  [Cookie notice](https://worldly.io/cookie-notice/)