It’s more expensive to boil a full kettle than a half-full kettle, because you’re using more energy to boil more water. If you’re boiling a full 3kW kettle, it could set you back about 42p

each time, because you’re using about 0.225 KWh. To boil a full kettle of water once a day every day for a year, you’ll be spending about £30.74. If you boil a half-full kettle every day for

a year, you’ll be spending £15.36 on average. To cut down costs, here are three things to save energy when making a brew.