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Electric
Consumption Calculator
Basics
Example of Domestic Charges
Online Calculator
How to Read your
eMeter  Downloadable Presentation
Basics
We'll calculate the cost of our electric consumption (see the
online calculator below).
This
calculation is based on this formula:
where:
W =
power of device (in watts)
H =
time (in hours)
R =
electricity rate (in dollars per KWH, provided by your company)
ec
= electricity charges to be calculated
You
need to enter in the calculator the rate charged by your
electricity company. You also need to know the power of the devices or
appliances you're using (we're trying approximate numbers, so don't
worry if you don't know the exact value). You also have to be aware of
the time that you're using those devices per month (in hours). It's
known that HVAC devices or appliances are responsible for at least 80%
of our monthly charges. Naturally, this changes in different
countries and in different seasons.
Device or appliance wattage (power) is usually printed right
on the
device.
Example
of Electricity Charges
Before
you do calculations for your household, we recommend
checking
the tags and owners manuals for your appliances to get precise figures.
Electricity Cost Calculator
Rate ($
per kwh) =
0.109
Power
(W) Time (h)
Charges
Device
1 110
7
$0.08
Device
2 1000
2
$0.22
Device
3 60
4
$0.03
Device
4 3
24 $0.01
Total =
$0.34
From
the table above, we can see that if your rate is 10.9 cents per kwh
(kilowatthour), a 60W bulb on for 4 hours can cost you 3 cents in
electricity (just for those 4 hours). A 110W desktop computer, on for
7 hours, can represent 8
cents in your bill (just for those 7 hours). A 3W alarmclock, on for
24 hours represents 1 cent in your bill. A 1000W iron can cost you 22
cents for 2
hours of service...
Online
Calculator  Electricity Consumption
Please,
enable JavaScript codes on your navigator, otherwise the calculator
won't work.


How
to read the electric meter
See this presentation to understand how to read the dials on your meter.
Just keep in mind how you read your analog clock, the concept is
exactly the same...
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