Why do you ask?
It may be convenient to leave the television on standby and wake it up with a press of a button on a remote - but it costs £24.61 per year, the research suggests, plus a further £23.10 for a set-top box, such as from Sky or Virgin Media.
Games consoles on standby work out at an average of £12.17, while computers could cost about £11.22.
And there's more:
- Microwave: £16.37
- Shower: £9.80
- Washing machine: £4.73
- Printer: £3.81
- Phone charger: £1.26
what you do?