Appliance Energy Cost Calculator

Enter your appliance's power rating, daily usage hours, and electricity price per kWh to find out exactly what it costs to run. The Appliance Energy Cost Calculator returns your daily, monthly, and annual energy cost along with total kWh consumed — so you can spot energy hogs and make smarter decisions about your household electricity use.

Select a common appliance to auto-fill its typical wattage, or choose Custom to enter your own.

Check the appliance label or manual for wattage.

How long the appliance runs per period.

$/kWh

Check your electricity bill for your rate. US average is ~$0.13/kWh.

Results

Annual Energy Cost

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Monthly Energy Cost

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Daily Energy Cost

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Annual Energy Consumed

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Daily Energy Consumed

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Power (Watts)

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Annual Cost Breakdown

Results Table

Frequently Asked Questions

How does the appliance energy cost calculator work?

The calculator converts your appliance's power rating to kilowatts, then multiplies it by daily usage hours to get kWh per day. Multiplying daily kWh by your electricity price gives the daily cost, which is then scaled to monthly (×30.417) and annual (×365) figures. The formula is: Cost = Power (kW) × Usage (hours) × Electricity Rate ($/kWh).

How much does electricity cost on average?

In the United States, the average residential electricity rate is approximately $0.13 per kWh, though it varies significantly by state — ranging from around $0.09/kWh in Louisiana to over $0.25/kWh in Hawaii and California. Check your utility bill for your exact rate.

What are the most power-hungry appliances at home?

Central air conditioners (2,000–5,000 W), electric water heaters (3,000–4,500 W), clothes dryers (4,000–5,000 W), and electric ovens (2,000–5,000 W) are typically the biggest energy consumers. Refrigerators and washing machines are moderate consumers, while LED bulbs and laptops use very little power.

What factors affect my electricity costs?

The main factors are the appliance's wattage (power rating), how many hours per day you use it, and your local electricity rate. The age and efficiency of the appliance also matter — older appliances often consume significantly more energy than modern Energy Star-rated equivalents.

How do I find the wattage of my appliance?

Check the label on the back or bottom of your appliance — it usually lists wattage (W) or amperage (A) and voltage (V). If listed in amps, multiply amps × volts to get watts. Your appliance manual or the manufacturer's website are also reliable sources.

How do I reduce my appliance electricity costs?

The most effective strategies are replacing old high-wattage appliances with Energy Star-certified models, reducing daily usage time, unplugging devices when not in use to eliminate standby power draw, using appliances during off-peak hours if your utility offers time-of-use rates, and setting thermostats a few degrees warmer in summer and cooler in winter.

What is standby power and does it cost much?

Standby power (also called phantom load or vampire power) is the electricity drawn by appliances when they are turned off but still plugged in. Common culprits include TVs, game consoles, and chargers. A single device may only use 1–5 W on standby, but across an entire household this can account for 5–10% of your total electricity bill annually.

How do I calculate annual energy consumption manually?

Use this formula from the U.S. Department of Energy: Annual kWh = (Wattage × Hours Used Per Day × Days Used Per Year) ÷ 1,000. Then multiply the result by your electricity rate in $/kWh to get the annual cost. For example, a 1,500 W heater used 4 hours/day for 120 days = 720 kWh/year. At $0.13/kWh, that's $93.60/year.

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