How Many kWh Does a Laptop Charger Use?
Laptop Charger energy cost calculator — see your exact daily, monthly, and yearly electricity cost.
US national average. Edit for your local rate.
Daily Energy Use
0.20
kWh / day
Monthly Cost
$1.10
Yearly Cost
$13.40
Laptop Charger — Cost Breakdown
| Period | kWh Used | Cost ($) |
|---|---|---|
| Per Hour | 0.0650 | $0.0122 |
| Per Day | 0.20 | $0.04 |
| Per Month (30 days) | 5.85 | $1.10 |
| Per Year (365 days) | 71.17 | $13.40 |
Charging a laptop from empty uses about the same energy as running a ceiling fan on high for 2.5 hours.
3 Ways to Cut Your Laptop Charger Energy Bill
- 🌱
Close unused browser tabs and apps before charging — a laptop under less CPU load charges faster and draws less total energy.
- 💡
Set a charge limit to 80% in BIOS or manufacturer software to improve charging efficiency and battery longevity.
- ⚡
Shut down the laptop instead of charging in sleep mode — charging a sleeping laptop takes longer and wastes more energy.
Laptop chargers draw stable wattage regulated by their internal power supply, with no startup surge.