kWh Cost Calculator
Calculate the total cost of any quantity of kilowatt-hours (kWh) across hours, days, months, and years at your exact utility rate.
Rate & Volume Parameters
Kilowatt-Hour Cost Formula
Total Cost = Kilowatt-Hours (kWh) × Rate per kWh ($/kWh)- Kilowatt-Hours (kWh): Cumulative meter usage registered over the billing cycle.
- Rate per kWh: Combined supply and distribution price per kilowatt-hour.
- Time Conversions: Pro-rates total usage across hours, days, months, and 365-day annual run rates.
Step-by-Step Worked Example
Calculation Steps:
How to Use This Calculator
Assumptions & Limitations
- Assumes a single flat rate per kWh without tiered baseline pricing adjustments.
- Billing period defaults to a standard 30-day utility cycle.
Frequently Asked Questions
What is the average cost per kWh in the United States?
As of recent US Energy Information Administration (EIA) data, the average residential electricity rate is approximately $0.165 per kWh, ranging from $0.11/kWh in states like Washington and Idaho to $0.28–$0.42/kWh in California, Hawaii, and New England.
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