Gas used is measured in cubic meters or cubic feet, however, your gas supplier must bill you on the basis of energy used i.e. kiloWatt hours (kWhs). For domestic gas usage a conversion formula is used to convert cubic meters or cubic feet into kWhs. This conversion formula has been approved by the Commission for Energy Regulation. For more information see the Commission for Regulation of Utilities website. The conversion formula can vary nationwide, as it depends on the local temperature, pressure and calorific value of the gas.
For any queries in relation to your bill including conversion factor queries, please contact your gas supplier.