Power Usage Calculator
Calculate electricity consumption and costs for any combination of devices — servers, computers, appliances, and more.
Desktop PCComputer
100W × 8h × 1 unit = 0.80 kWh/day
$3.12/mo
Monitor 27"Computer
55W × 8h × 1 unit = 0.44 kWh/day
$1.72/mo
Summary
Total draw155W
kWh / day1.24
kWh / month37.20
kWh / year452.60
Estimated cost @ $0.13/kWh
Daily
$0.16
Monthly
$4.84
Yearly
$58.84
Top Consumers
1. Desktop PC65%
2. Monitor 27"35%
Tips
Use a Kill-a-Watt meter for accurate wattage readings on individual devices.
Servers and desktops use significantly more power under load than idle.
Check your electricity bill for your exact rate — it varies widely by location.
Hawaii rates are among the highest in the US at ~$0.33/kWh.