Standby power calculator
What do plugged-in devices cost while doing nothing?
Estimate the electricity and money used by routers, televisions, consoles, chargers and other devices left on standby.
✓ Instant estimate · ✓ No sign-upEditable example — replace it with your real numbers.
What counts as standby power?
What counts as standby power?
Standby power is the small continuous draw while a device appears off but remains ready. We multiply watts × devices × standby hours and use 0.4 kg CO₂e per kWh only as a broad comparison estimate; the real grid factor varies by place and time.
All formulas and assumptions →Quick answers
How do I know standby watts?
Check the manual or measure the device with a plug-in power meter.
Should I unplug every device?
Prioritize clusters with several watts each, long idle periods and easy-to-reach power strips.
Do phone chargers use much without a phone?
Modern chargers usually use very little, so measure before changing a useful routine.