How the estimate works
Monthly kWh = (estimated watts ÷ 1,000) × hours per day × days per month.
Assumptions and limits
Consumption varies with hardware, display, peripherals, power settings and workload. The entered wattage is an estimate unless measured.
Actual computer power depends on its hardware, peripherals, settings and workload. Use a measured average when available.
Example
At 300 W for 4 hours a day over 30 days: 0.3 × 4 × 30 = 36 kWh. Multiply by your own rate to estimate the energy charge.