Do the Math

  • With some simple arithmetic and the help of our Gasoline Energy Equivalents and Conversion Calculator, you can relate energy from different sources in varying amounts. A gallon of regular gasoline is a good benchmark to work from; it's familiar to everyone, yet its energy potential, compared to other sources like pounds of coal, therms of natural gas, or kilowatts of electricity, can be surprising.

    We also have a Therms & Barrels Calculator that lets you compare equivalents related to the energy in a barrel of oil.

    When thinking of energy use and potential waste and savings, keep in mind the concept of "pure" energy, no matter how it's expressed or what source it comes from. The important thing is how much energy is needed to do a specific amount of work. Energy consciousness means thinking about how efficiently you can apply the energy to the work, ranging from how you manage your water heater to how you approach and leave a stoplight in your car.

    No one can be entirely energy efficient, and we all have thresholds of patience, comfort, and enthusiasm. But energy consciousness itself, and the formation of at least some good personal energy habits, will make a big difference when we put all our habits together. Other good calculators:

    Soltrex Interactive Energy Calculator
    EIA Energy Kids Page Calculator
    U.S. Department of Energy Calculators

« Defy the disposable culture | Main | Coast Guard patrol boat on biodiesel »



I have been playing with the wind now for the best part of two years.
What always strikes me as a tragedy with the smaller systems aimed at us RV/campers is the rather manic pricing. I say manic, because I just can't see where some of these manufacturers get their prices from. Ok break it down; I can personally build a 2kw generator for under $150, it will do the same as many of the ones on the market yet cost me very little.

You look at the nearest comparison, over here in the UK they are upwards of £400 (approx $600)..why?? If I 'joe blogs on the street' can source suitable materials for so little, why are these companies unable to?

It seems that everyone is jumping on the 'green wagon' but for some the green is our cash going into their pockets!

My advice, make your own, it might not look quite as pretty, but look at the cash you will not be paying for the privaledge of doing your bit for the environment


Teresa Burgun

Here is a link for a personal windmill that looks great

The comments to this entry are closed.