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How Much Does it Cost to Run My Appliances?Longmont Power & Communications' logo

Many factors affect how much electricity an appliance uses: where it's located, your home wiring, how many people live in the home, and how the appliance is used.

The electricity you use is determined by measuring the kilowatt hours ("kWh"). One kWh is equal to operating a 100 watt-light bulb for 10 hours.

Typical energy use of some electric appliances

Appliance
Range of watts used
Appliance
Range of watts used
Aquarium
50 - 1210
Computer monitor
150
Clock radio
10
Laptop
50
Coffee maker
900 - 1200
Stereo
70 - 400
Clothes washer
350 - 500
TV-19"
65 - 110
Dishwasher
1200 - 2400
TV--27"
113
Electric blanket single/double
60/100
TV--36"
133
Fan--ceiling
65 - 175
TV-projection
170
Fan--window
55 - 250
TV--flat screen
120
Fan--furnace
750
Toaster
800 - 1400
Fan--whole house
240 - 750
Toaster oven
1225

Hair dryer

1200 - 1875
VCR/DVD
17 - 21/20 - 25

Heater (portable)

750 - 1500
Vacuum cleaner
1000 - 1400
Iron
1000 - 1800
Water heater (40 gal)
4500 - 5500
Microwave oven
750 - 1100
Water bed
120 - 380
Computer--CPU
120
   

Precise usage

Calculate more precise usage (consumption in daily kilowatt hours) by using this formula:

Wattage x Hours used per day
1000

Calculating the cost

You can figure the cost of using an appliance each day by multiplying the figure from above times your electric rate. Click here for more information about LPC's residential electric rates.

More information

While some appliances, such as your refrigerator, are turned "on" all the time, they actually cycle on and off at a rate that depends on a number of factors. These factors include insulation, room temperature, maintenance, and usage.

Also, many appliances continue to draw a small amount of power when they are switched off. These "phantom loads" occur in most appliances that use electricity, such as VCR's, televisions, stereos, computers and kitchen appliances. Most phantom load will increase the appliance's energy consumption a few watts per hour. These loads can be avoided by unplugging the appliance or using a power strip and using the switch on the power strip to cut all power to the appliance.