Using the Kill A Watt™ Meter - Small Appliances
Small appliances will use less power than a large
appliance. To measure an appliance that is not
plugged in for long periods of time, use Watts
instead of KWH.
Getting Started
Plug the meter into the wall and plug the appliance
into the meter.
Step 4 - Calculate the Results
Step 2 - Capture the Data
Step 1 - Plug it In
Press the Watts button. It is the center button on the meter.
This displays the Watts as the active power.
Example: The hair dryer uses 1400 watts on “high.”
Figure the number of watts used in a month:
Example: 1400 watts x 5 hours = 7000 watt-hrs.
Convert to kilowatt hours (KWH) by dividing by 1000.
Example: 7000 1000 = 7 KWH
Multiply by the rate charged by the utility (found on the bill.
Example: 7 KWH x 8¢ per KWH = 56¢ monthly
The appliance used in the example would use approximately $6.72 per year in electric costs.
Step 3 - Estimate Hours Used
Estimate how many hours you use the appliance in a month.
Example: The hair dryer is used 10 minutes each day, about 30
days per month. (10 x 30 = 300 minutes per month, or 5 hours).