You enter your electricity rate in dollars per kilowatt-hour, then add appliances and the hours per day each one runs. For each appliance the tool computes kWh = watts × hours ÷ 1,000, then multiplies by your rate to get the daily cost. Monthly and yearly totals use 30 and 365 days respectively. Wattages are typical values — check your appliance's label for exact figures.
Look at your most recent electric bill — the rate is usually listed in cents or dollars per kWh. The U.S. national average is roughly $0.16/kWh, but it varies widely by state and utility. Some plans have tiered rates that change with usage.
Real electric bills include base charges, demand charges, taxes, renewable surcharges, and sometimes tiered or time-of-use pricing. This calculator estimates the energy-usage portion only, which is typically the largest component but not the whole bill.
Check the label or nameplate on the device — it usually lists watts (W) or amps and volts (multiply amps × volts to get watts). You can also use a plug-in power meter (like a Kill A Watt) for an exact reading during actual use.
Heating and cooling equipment (air conditioners, space heaters, electric furnaces) are typically the biggest energy consumers. Clothes dryers, water heaters, and ovens also rank high. LED lights and modern electronics are generally quite inexpensive to operate.
Standby power (devices plugged in but not actively in use) typically adds 5–10% to a household's electric bill. Smart power strips that cut standby draw can help reduce this "phantom load."
Estimate only. Results reflect your inputs and standard formulas. Double-check important decisions independently.