Operating cost
Electricity Cost Calculator
Multiply energy you already know in kilowatt-hours by the dollars-per-kWh on your bill. Use this when a meter, EnergyGuide label, or another calculator already gave you kWh.
Numbers stay in this browser. EnergyToolMage does not upload your inputs or require an account.
Formula
cost_USD = kWh × USD_per_kWh
Assumptions
- You entered a single flat $/kWh.
- Monthly and yearly companions use 365.25 days/year and twelve equal months.
- Example rate $0.16/kWh is illustrative only.
How it works
Cost is energy times price. The calculator never fetches a rate. Optional daily, monthly, and yearly companions use the calendar convention disclosed in Assumptions.
Inputs and results
Inputs: kWh, USD/kWh, period. Outputs: period cost in USD, plus daily/monthly/yearly companions when a period is selected.
Worked examples
100 kWh at $0.16/kWh
100 × 0.16 = $16.00 for that block of energy. If 100 kWh is a monthly amount, the yearly companion is $192.00 before fixed charges.
10 kWh per day
At $0.16/kWh that is $1.60 a day. Using 365.25 days/year, the yearly companion is $584.40.
How to use this calculator
- Enter the kilowatt-hours you want to price.
- Enter your electricity rate in dollars per kWh (16¢ is 0.16).
- Choose whether that kWh is a one-time amount, a daily amount, a monthly amount, or a yearly amount.
- Read the dollar result and any annualized companions. They are estimates.
Limitations
- Does not model tiered, time-of-use, demand, or fixed customer charges.
- Does not certify a meter reading or a utility bill.
- Does not look up a ZIP-code or utility rate.
- The rate is the number you type, including the illustrative $0.16 default. This page does not display a dated national cents-per-kWh benchmark.
Sources and freshness
- Every rate, wattage, hour, and loss percentage is a user input or a labeled example. Nothing here is a live utility tariff.
- The $0.16/kWh figure that appears in examples is an illustrative default, not a U.S. average and not current.
- Annualization uses 365.25 days per year and 365.25 ÷ 12 days per month. Your billing cycle will differ.
Questions
Where do I find my electricity rate?
Use a recent bill. Divide the energy charges you want to model by the kWh on that bill, or use the supply-plus-delivery cents/kWh if the bill prints one. This page does not look up a utility tariff.
Is the example $0.16/kWh the current U.S. average?
No. It is an illustrative default so the form is not blank. Replace it with your bill rate. EnergyToolMage does not publish a live national average.
Does this replace my utility bill?
No. Bills include fixed customer charges, taxes, tiers, and time-of-use periods that a single flat rate cannot reproduce.
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