Your gas consumption depends on a number of factors, including the number of people who live in your home, how you cook and how you heat your home. To calculate your savings you for each of the available tariffs, we need to know how much gas is consumed at your home. You can tell us this in kWh or €, and for best results you should tell us your annual consumption in kWh - but don't worry if you're not sure, we can estimate this for you based on the national average consumption figure which is published by the Commission for Regulation of Utilities (CRU).