How Many kWh Does a Digital Alarm Clock Use?
Digital Alarm Clock energy cost calculator — see your exact daily, monthly, and yearly electricity cost.
US national average. Edit for your local rate.
Daily Energy Use
0.05
kWh / day
Monthly Cost
$0.27
Yearly Cost
$3.30
Digital Alarm Clock — Cost Breakdown
| Period | kWh Used | Cost ($) |
|---|---|---|
| Per Hour | 0.0020 | $0.0004 |
| Per Day | 0.05 | $0.01 |
| Per Month (30 days) | 1.44 | $0.27 |
| Per Year (365 days) | 17.52 | $3.30 |
Running a digital alarm clock all year uses about the same energy as running a hair dryer for 12 minutes.
3 Ways to Cut Your Digital Alarm Clock Energy Bill
- 🌱
Dim the display to the lowest readable setting — the LED or LCD backlight is the main power draw.
- 💡
Use a battery-backup alarm clock instead if you only need the alarm — some plug-in clocks draw more for the display than necessary.
- ⚡
Use your smartphone alarm instead — you're already charging it, and the additional draw is negligible.
Digital alarm clocks are simple electronics drawing tiny, constant wattage with no motor or surge.