Does that use a lot of energy?

A detailed methodology reference for an energy consumption estimation tool, covering watt-hour calculations for a wide range of household devices and activities. Categories include lighting, digital technologies (including a ChatGPT query estimate of ~0.3 Wh), kitchen appliances, washing and drying, heating and cooling, driving (electric vs petrol), and gardening equipment. Energy costs are sourced from Eurostat, Ofgem, and the US EIA. All values are approximations intended to convey order-of-magnitude comparisons, with non-electric products converted to watt-hour equivalents for consistency.