Computer Electricity Cost Calculator
Estimate the running electricity cost of a computer, console or other device from its wattage, hours used and your tariff.
Check your electricity bill for your actual usage rate
Your results
Calculation breakdown
- Daily energy
- (watts × hours ÷ 1000) kWh
- Daily cost
- daily kWh × rate (c/kWh ÷ 100)
Worked example
A 250 W gaming PC used 5 hours a day at 30c/kWh costs about 250 × 5 ÷ 1000 × 0.30 = $0.375/day, or roughly $137/year.
Assumptions
- Electricity rate must be entered from your own bill, as tariffs vary by state, network and retailer.
- Assumes a constant average power draw while in use; actual draw varies with workload.
- Excludes any standby/idle power outside the stated hours of use.
How this calculator works
Calculate the daily, weekly and annual electricity cost of running a PC, gaming console or monitor from its power draw in watts, hours of use, and your electricity rate in cents per kWh from your bill.
Frequently asked questions
Where do I find my device's wattage?
Check the power supply rating on the device or box, or measure actual draw with a plug-in power meter for a more accurate figure.
Where do I find my electricity rate?
Your usage rate in cents per kWh is shown on your electricity bill or your retailer's plan details; it varies by state, network and retailer.
Does this include standby power?
No, enter an average wattage that reflects your typical usage pattern if you want standby time included.
Actual prices, usage, efficiency and savings vary by provider, equipment, location and behaviour.