Calculate the cost of electricity usage in kilowatt-hours. Enter your kWh consumption and utility rate to find your total energy cost instantly.
Understanding the cost of electricity starts with knowing how much you pay per kilowatt-hour (kWh). A kilowatt-hour is the standard unit used by utility companies to measure energy consumption. It represents the energy used by a 1,000-watt appliance running for one hour. Whether you're budgeting for your household or analyzing business energy expenses, this kWh cost calculator provides instant results.
The average residential electricity rate in the United States hovers around $0.12–$0.16 per kWh, but rates vary dramatically by state, utility provider, and time of use. States like Hawaii and California can exceed $0.30/kWh, while states like Louisiana and Idaho may charge under $0.10/kWh. Knowing your exact rate and multiplying it by your consumption gives you a clear picture of your energy spending.
This calculator accepts any kWh amount and any rate, making it useful for quick spot-checks on individual appliances, monthly bill verification, or large-scale commercial energy audits. Use it alongside our appliance energy calculator for detailed per-device breakdowns.
Estimating energy costs manually is tedious and error-prone. This calculator removes the guesswork by instantly multiplying your kWh usage by your electricity rate. Use it to verify your utility bill, compare rate plans, or estimate costs before purchasing energy-hungry equipment. Consistent measurement creates a reliable baseline for tracking energy efficiency improvements and validating the impact of conservation measures and equipment upgrades over time.
Total Cost ($) = kWh × Rate ($/kWh)
Result: $117.00
If you consume 900 kWh in a month and your electricity rate is $0.13 per kWh, your energy cost is 900 × $0.13 = $117.00. This does not include fixed charges, delivery fees, or taxes that may appear on your bill.
Electricity rates are set by your utility company and approved by state regulators. They can be flat (same rate all day), tiered (rate increases with usage), or time-of-use (different rates for peak and off-peak hours). Understanding your rate structure is the first step to managing energy costs effectively.
A typical US household uses about 900 kWh per month. At the national average rate of roughly $0.14/kWh, that translates to about $126 per month in energy charges alone. Adding delivery fees and taxes brings the average monthly bill to approximately $150–$170.
The cheapest kWh is the one you never use. Start with an energy audit to identify where electricity is wasted. Common culprits include old refrigerators, incandescent lighting, poorly insulated water heaters, and phantom loads from devices on standby. Replacing a single old refrigerator can save 200–400 kWh per year.
A kilowatt-hour is a unit of energy equal to 1,000 watts consumed for one hour. It is the standard billing unit used by electricity providers worldwide. For example, a 100-watt light bulb running for 10 hours uses 1 kWh.
Your rate is listed on your utility bill, typically under "supply charge" or "energy charge." It is expressed in cents or dollars per kWh. If you have a tiered or time-of-use plan, you may have multiple rates depending on usage level or time of day.
Utility bills include additional charges beyond the energy cost: delivery/transmission fees, demand charges, taxes, regulatory surcharges, and fixed customer charges. The kWh cost calculator shows only the energy portion of your bill.
As of 2025, the national average residential rate is approximately $0.13–$0.16 per kWh. Rates vary significantly by state, with some areas exceeding $0.30/kWh and others below $0.10/kWh. Commercial and industrial rates are often lower.
Yes. Enter your commercial kWh usage and your commercial rate. Note that commercial customers often have demand charges (based on peak kW) in addition to energy charges, which this simple calculator does not cover. Use our demand charge calculator for that.
Switch to energy-efficient appliances, LED lighting, and smart thermostats. Shift heavy usage to off-peak hours if you have time-of-use pricing. Weatherize your home, maintain HVAC systems, and consider solar panels for long-term savings.