cost of boiling a kettle?

best answer
This means it costs the following To boil a full kettle (2 litres) £0.06p; To boil a half-full kettle (1 litre) £0.03p; To boil two cups of tea (500ml) £0.015p Naturally it is more expensive to boil a full kettle than a half-full kettle as there is less water that needs to be heated meaning less energy is used.