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Energy Savings Calculator

 

Using bulbs that require less electricity can mean big savings. Use the energy calculator below to find your annual cost for each "1 WATT" of electricity a bulb uses (steps 1 & 2). Then find out how much you can reduce your expenses with energy efficient replacement bulbs (step 3).

Step 1. Calculate your true energy cost.

Enter information from your electric bill to figure out your true cost per kWh for the facility your bulb is in (this includes surcharges, delivery fees, taxes, etc).

Monthly electricity bill
$

÷

Total monthly kWh

=

True cost / kWh
$

OR, if your electric bill is not available, look up your state's average kw/h cost and enter it here:

$ kw/h

Step 2. How many hours is your bulb on per year?

Annual cost per watt will vary depending on the amount of time the bulb is on. Estimate the amount of time the bulb fixture is turned on in your facility.

hours/day

×

days/week

×

weeks/year

=

hours/year

Recalculate this value for bulbs in areas of your facility that see different levels of use (hallway, foyer, office, loading dock, etc.)

Atxxhours per year and $xx per kilowatt hour, your annual "1 watt" cost is $xx

In other words, every "1 watt" a bulb uses costs you $xx per year, presuming it is on xx hours per year at a rate of $xx per kilowatt hour.

How is this calculated?

Step 3. How much money could you be saving?

Your Current Bulb

watts

×

Your annual cost per "1 WATT"
$

Annual cost to operate
$

Your Replacement Bulb

watts

×

Your annual cost per "1 WATT"
$

-Annual cost to operate
$

Your Savings

Reduction in watts
watts

×

Your annual cost per "1 WATT"
$

=Annual savings per bulb
$

×Number of bulbs replaced

Total savings per year! =$

Watts saved per year
(at 2288 hrs/year)