Handy Electric Heating Engineering Constants and OHMs Law

Here is a very handy "cheat-sheet" for calculating Ohm's Law and other engineering constants that come in very handy when calculating wattages, voltages and current draw of electric heating elements.

These equations are important when sizing any type of electric heating element including cartridge, band, immersion, or flexible heaters.

To calculate any wattage, voltage or current, you need to know two of the variables and refer to the diagram in the document to calculate the third.

Another important quick reference chart is Fahrenheit to Centigrade temperature conversion as shown below.