The NASA SCIence Files™
Reading an Electric Meter
Safety Check
  • Do not play with electricity.
  • Do not place objects on top of electrical cords or wires becasue the wires may become damaged.
  • When using electrical devices, follow all instructions.
  • When you remove a plug from a wall outlet, use the plug; do not pull on the cord.
Let's take a closer look at how to read an electric meter!

What you already know:

What you need to know: An electric meter is located on the outside of your house where the power lines meet your house. The electric meter keeps track of the amount of energy used by your household. So, all you need to do is remember a few steps, know how to subtract, and reading a meter can be a snap!


Rules to remember when reading an electric meter:

electric meter dials


Practice Reading an Electric Meter

Below are pictures of P.U.'s meter on the first day of the month and the last day of the month. Read each meter and type the four-digit number it shows in the box below it.

Meter on the first day of the month:
Meter on the first day of the month
What is the reading on this meter?

Meter on the last day of the month:
Meter on the last day of the month
What is the reading on this meter?

Now we need to figure out how much electricity was used during the month. You do this by subtracting the reading on the first day of the month from the reading on the last day of the month.

Last day of the month - First day of the month = Electricity used during the month
- = kilowatt-hours

Now let's see how much this will cost the poor dog. The electric company charges P.U. seven cents per kilowatt-hour. To figure out how much he'll have to pay this month, we just multiply the number of kilowatt-hours used by the cost ($0.07).

Kilowatt-hours used during the month x Cost = Total cost for the month
x $0.07 = $