Tool

PC electricity cost

A PC's cost is watt-hours times your rate. Pick a state from EIA Table 5.6.A, residential, August 2026, or type your own price. The state figures are average revenue per kilowatt-hour, not your tariff.

Load, wattsUse the PSU calculator's continuous estimate, or a wall-meter reading.Hours per day

Electricity rate

EIA Electric Power Monthly, Table 5.6.A, average price of electricity to ultimate customers by end-use sector, residential column. August 2026, released 2026-10-23. 2026 values are preliminary. EIA does not publish a tariff. The figure is average revenue per kilowatthour from Form EIA-861M. It is not your utility's rate, and it is not a time-of-use price.

The opening example is a 400 W session, 4 hours a day, at the US average. It is not your bill.

Yearly electricity

$106.05

US residential average, 18.16¢ per kWh. A year here is 365 days. A month is 30 days.

Per day$0.29

30 days$8.72

kWh per year584.0

Average while on400 W

Estimates only. Use at your own risk.