General Information:
Rates effective 1/1/01 form the basis for these calculations which use the end block charge of $0.067 or 6.7 cents per kWH. City Light charges a lower rate for the first 16 kWh to provide an affordable block of electricity for essential needs such as cooking, refrigeration, lighting, heating. Wattage figures may vary. Wattage is generally specified on the appliance.
Call the Conservation Help Line at 206.684.3800 or send email to
rescons.scl@seattle.gov
for more ways to save energy in the home.
NEWWe've added an
interactive calculator
for those who want to do their own math.
Kitchen
|
Appliance
|
Wattage
|
Time
|
kWh
|
Cost
|
Bimonthly Bill Impact
|
|
Broiler oven
|
3000
|
15 min
|
0.750
|
$0.050
|
$3.02
|
|
Coffee maker
|
900
|
10 min
|
0.150
|
$0.010
|
$0.60
|
|
Dishwasher - hot water wash/rinse
|
1400
|
1 hr
|
1.400
|
$0.094
|
$5.63
|
|
Food mixer or blender
|
200
|
2 min
|
0.007
|
$0.001
|
$0.03
|
|
Oven, microwave
|
1600
|
20 min
|
0.533
|
$0.036
|
$2.14
|
|
Oven, regular or self-clean
|
3750
|
1 hr
|
3.750
|
$0.251
|
$15.08
|
|
Range top
|
500
|
2 hr
|
1.000
|
$0.067
|
$4.02
|
|
Refrigerator (12 cu ft, manual defrost)
|
110
|
5.83 hr
|
0.642
|
$0.043
|
$2.58
|
|
Refrigerator (18 cu ft, frost free)
|
400
|
6.33 hr
|
2.533
|
$0.170
|
$10.18
|
|
Slow cooker or crock pot
|
150
|
6 hr
|
0.900
|
$0.060
|
$3.62
|
|
Toaster
|
1200
|
2 min
|
0.040
|
$0.003
|
$0.16
|
Laundry
|
Appliance
|
Wattage
|
Time
|
kWh
|
Cost
|
Bimonthly Bill Impact
|
|
Clothes dryer
|
5600
|
1 hr
|
5.600
|
$0.375
|
$22.51
|
|
Clothes washer, cold water
|
600
|
20 min
|
0.200
|
$0.013
|
$0.80
|
|
Iron
|
600
|
1 hr
|
0.600
|
$0.040
|
$2.41
|
Lighting
|
Appliance
|
Wattage
|
Time
|
kWh
|
Cost
|
Bimonthly Bill Impact
|
|
Fluorescent bulb (18-watt)
|
18
|
2 hr
|
0.036
|
$0.002
|
$0.14
|
|
Light bulb (60-watt)
|
60
|
2 hr
|
0.120
|
$0.008
|
$0.48
|
|
Light bulb (100-watt)
|
100
|
2 hr
|
0.200
|
$0.013
|
$0.80
|
Heating and Cooling
|
Appliance
|
Wattage
|
Time
|
kWh
|
Cost
|
Bimonthly Bill Impact
|
|
Air conditioner, window
|
4000
|
2 hr
|
8.000
|
$0.536
|
$32.16
|
|
Fan (box)
|
125
|
2 hr
|
0.250
|
$0.017
|
$1.01
|
|
Furnace, electric
|
30000
|
4 hr
|
120.000
|
$8.040
|
$482.40
|
|
Heater, baseboard
|
1500
|
4 hr
|
6.000
|
$0.402
|
$24.12
|
|
Heater, permanent baseboard
|
1500
|
4 hr
|
6.000
|
$0.402
|
$24.12
|
|
Heater, portable
|
1500
|
4 hr
|
6.000
|
$0.402
|
$24.12
|
|
Hot Water Heater (energy efficient)
|
4500
|
1.30 hr
|
5.850
|
$0.392
|
$23.52
|
|
Hot Water Heater (pre 1998)
|
4500
|
1.85 hr
|
8.325
|
$0.558
|
$33.47
|
Entertainment
|
Appliance
|
Wattage
|
Time
|
kWh
|
Cost
|
Bimonthly Bill Impact
|
|
Radio
|
8
|
4 hr
|
0.032
|
$0.002
|
$0.12
|
|
Stereo
|
250
|
2 hr
|
0.500
|
$0.034
|
$2.01
|
|
Television
|
250
|
4 hr
|
1.000
|
$0.067
|
$4.02
|
Miscellaneous
|
Appliance
|
Wattage
|
Time
|
kWh
|
Cost
|
Bimonthly Bill Impact
|
|
Clock
|
3
|
24 hr
|
0.072
|
$0.005
|
$0.29
|
|
Computer
|
300
|
2 hr
|
0.600
|
$0.072
|
$2.41
|
|
Hair dryer
|
1500
|
5 min
|
0.125
|
$0.008
|
$0.50
|
|
Hot tub heater, 3/4 horsepower*
|
3000
|
5 hr
|
15.000
|
$1.005
|
$60.30
|
|
Hot tub pump, 3/4 horsepower*
|
560
|
2 hr
|
1.120
|
$0.075
|
$4.50
|
|
Pond pump
|
560
|
2 hr
|
1.120
|
$0.075
|
$4.50
|
|
Sewing machine
|
200
|
1 hr
|
0.200
|
$0.013
|
$0.80
|
|
Vacuum Cleaner
|
600
|
30 min
|
0.300
|
$0.020
|
$1.21
|
|
Waterbed heater
|
300
|
24 hr
|
7.200
|
$0.482
|
$28.94
|
|
* One horsepower = 746 watts
|
|
|
|
|
For Appliances Not Listed
|
|
|
Daily Cost =
Wattage X
Time X
Rate per kWh ÷
1000
Bimonthly Bill Impact =
Daily Cost X
60
|
|
City Light customers:
Multiply kWh times 6.7 cents to find the cost per kWh. 6.7 cents is the winter residential rate for all kWh over the first 16 per day.
Visit
Conservation at Home, call the Conservation Help Line at 206.684.3800 or send email to
rescons.scl@seattle.gov
for more ways to save energy in the home.
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