Standby Power Cost Calculator
Yearly cost and energy of devices left on standby, per device and in total, with the carbon behind it.
Results
Total cost per year
63.072
Energy
350.40
kWh/a
Total cost per year
7.8840
CO₂ emissions
80.59
kg
Hours
3504
h
What this tool does
Standby is small and permanent, which is the worst combination: five watts sounds like nothing but runs 8760 hours a year. A television, a set-top box, a games console, a printer, a microwave and a few chargers add up to a bill most households never notice. Modern equipment sold in the EU is limited to half a watt in standby, but anything more than a few years old often draws ten times that.
Formula
kWh = power × hours ÷ 1000
Variables
| Symbol | Meaning | Unit |
|---|---|---|
pw | Standby power | W |
nd | Number of devices | — |
hd | Hours per day | h |
pe | Price per kWh | — |
CY | Total cost per year | — |
EY | Energy | kWh/a |
C1 | Total cost per year | — |
CO | CO₂ emissions | kg |
TV | Hours | h |
Worked example
- Standby power5 W
- Number of devices8
- Hours per day24 h
- Price per kWh0.18
- Total cost per year63.072
- Energy350.40 kWh/a
- Total cost per year7.8840
- CO₂ emissions80.59 kg
- Hours3504 h
Limitations
- The result is an estimate based only on the values you type. Real situations often include factors this calculator does not know about.
- The tool works with whatever currency you use for the inputs; it does not convert between currencies.
- The default values are typical reference figures, not measurements of your situation. Replace them with your own data whenever you have it.