Computer Electricity Cost Calculator – Desktop and Laptop
Calculate monthly electricity cost for your desktop PC, laptop, or workstation.
About This Calculator
Calculate monthly electricity cost for your desktop PC, laptop, or workstation. Use the calculator above for instant results.
Worked Examples
- Daily: 2.4 kWh | Monthly: 72 kWh = $9.36
Answer: $9.36/month
- Monthly: 13.5 kWh = $1.76
Answer: $1.76/month
- Monthly: 180 kWh = $23.40
Answer: $23.40/month
Who Uses This Calculator?
Calculate computer electricity cost.
Include computer power in utility budget.
Reduce home electricity usage.
Calculate workstation fleet power costs.
Common Mistakes to Avoid
❌ Idle vs load power
A gaming PC uses 300W under load but 50-100W at idle. Average actual draw depends on usage pattern. Game only part of the day?
❌ Monitor adds significant power
Typical 27" monitor: 20-50W. 32" 4K: 50-100W. Add monitor power to computer for total workstation cost.
Frequently Asked Questions
Average PC power consumption?
Desktop (idle): 50-100W. Desktop (gaming): 200-500W. Laptop: 20-60W. Mac mini: 10-40W. Workstation: 300-1000W.
Energy-efficient options?
ARM-based laptops (M-series Mac, Snapdragon): 10-20W. Mini PCs: 10-35W. Often 5-10× more efficient than full desktop.
Sleep mode savings?
Sleep: 1-5W. Hibernate: near 0W. Turn off or sleep when not in use — idle desktop power adds up significantly over a year.