Standby Power Cost Calculator
Fill in the values and the answer updates as you type.
How the Standby Power Cost Calculator works
Energy = devices × standby watts × hours × 365 ÷ 1000. TVs, game consoles, chargers, and set-top boxes often draw 1–10 W while idle. A plug-in watt meter shows the real figure for each device. Example: with the default values, annual standby cost comes to $43.8.
Inputs and results
The Standby Power Cost Calculator takes 4 inputs and gives 3 results.
What you enter
- Devices on standby — starts at 10.
- Standby power per device (W) — starts at 4.
- Standby hours per day (h) — starts at 20.
- Electricity price ($/kWh) — starts at 0.15.
What you get
- Annual standby cost
- Annual energy (kWh)
- Monthly cost
Example: Standby Power Cost Calculator with the starting values
With devices on standby 10, standby power per device 4 W, standby hours per day 20 h and electricity price 0.15 $/kWh, the calculator returns:
| Annual standby cost | $43.8 |
|---|---|
| Annual energy (kWh) | 292 |
| Monthly cost | $3.65 |
Change any value above and the results update straight away.
Standby Power Cost Calculator FAQ
How do I use the Standby Power Cost Calculator?
Enter devices on standby, standby power per device, standby hours per day and electricity price in the fields, then read annual standby cost, annual energy (kwh) and monthly cost in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Standby Power Cost Calculator calculate?
What devices cost you while idle or on standby. It returns annual standby cost, annual energy (kwh) and monthly cost from the 4 values you provide.
What values does the Standby Power Cost Calculator start with?
It opens with devices on standby 10, standby power per device 4 W, standby hours per day 20 h and electricity price 0.15 $/kWh so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Standby Power Cost Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Standby Power Cost Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.