How does it work?
Running energy = power [W] × hours per active day × active days / 1000. Standby energy = standby power × remaining hours in a simplified 30-day month / 1000.
Total cost = energy [kWh] × price per kWh. Fixed network fees and time-of-use rates are not included. Preset wattages are illustrative, not model-specific measurements.
Important: A plug-in power meter is more reliable than a device’s maximum rated wattage.
Frequently asked questions
Why might my bill be higher?
Additional utility fees and variable rate components are not included unless you factor them into your price per kWh.
Does a 750 W PSU mean my PC always draws 750 W?
No. A PSU rating is its output capacity, not the computer’s constant consumption.