- Input Compressor Horsepower

- Input hours over which you would like to calculate cost

- Input compressor cost per KWH in dollars

- *Optional* Input motor efficiency in whole number without %

This is what is most important to the manager of the plant or owner of the compressor. This will tell you how much it costs in electricity to run your air compressor. To use the calculator enter the compressor horsepower (KW/.746) don't forget to include the fan, the time over which you would like to calculate (one year at 24*7 is 8760 hours), cost of electricity in KWh(this can be found on your electric bill), and the efficiency of the motor (this is on the nameplate). This is an easy way to see how much changing your motor out for a higher efficiency motor can save you.