Home > Calculators > Simple Energy Calculator

Simple Energy Calculator

Calculate the energy savings you’ll gain by relamping your lighting system.
Also find out how long it will take to recoup your full investment for the new system.

Enter the following information and click “calculate.”

Your results will display below.

* Number of fixtures:
* Average number of hours on per year:
* Your electric cost per kilowatt hour: £
* Watts per fixture used in current system:
* Watts per fixture used in proposed system:
Cost to upgrade each fixture*: £
Click to calculate

Cost of Electricity

Current system: per year
Proposed system: per year

Energy Savings (with proposed system)

Each fixture: per year
Total: per year

Using only your energy savings, you will get your full investment back in

* This cost should include the lamp, ballast, and labor required to replace the fixture. You may want to subtract any costs that would have been incurred with the current system.

* Required