Question: are kettles expensive to run?
Answer: Power usage – Kettles The average kettle is between 2 and 3 kilowatts (kw). ... Most people will be charged per unit of electricity so you might be charged 12p per kwh used. So if you had something that uses 1kw, it would need to be on for a full hour in order to use up 1kwh. The cost of this would be 12p.