Ohms Law Calculator

Ohms Law Calculator

Welcome to Vaping Hardware’s Ohms Law Calculator!

For those of you unfamiliar with Ohms Law, this calculator will allow you to determine whether the coil, tank and mod you’re using will work safely together. Just enter two of the below inputs and our calculator will work out the rest for you! It’s as simple as that!

If you’re unfamiliar with Ohms Law and how it relates to battery safety, please take a look at our guide to Ohms Law!

Please only enter two of the below values. If you enter three then the calculator won’t correctly calculate the remaining value.


Enter two values into the form below:

Resistance  (R)  Ω
Current  (I)  Amp(s)
Power  (P)  Watt(s)
Voltage  (V)  Volt(s)

Thanks for using our calculator and we hope you found it useful! If you’ve got any questions, feel free to drop us a comment below! If you’d like to share this calculator with your friends, please hit the share buttons underneath. Happy vaping!

Share this Calculator

Comments 2

  1. How do I calculate Ohm’s Law when in TC mode? I’m running 0.64 ohms, but the wattage fluctuates: about 25 watts when I first fire up, then drops down to about 15. Input wattage in TC mode is 100, cut-off voltage is 12.

    1. Post
      Author

      Hi Ross,

      Ohm’s Law remains constant regardless of whether you’re using a Mod in TC mode. If you want to know a bit more about Ohm’s Law then have a look at our guide to understanding Ohm’s Law. The TC mode means your Mod is controlling the temperature of your coil with pre-determined settings.

      We usually talk about Ohm’s Law when it comes to a mechanical unregulated Mod. As your using TC mode you must have a regulated Mod, in which case Ohm’s Law is calculated slightly differently. You might find our Battery Amp Draw / Drain Calculator useful in telling you some more information about the setup you have. You mention though that your cut-off voltage is 12V which suggests you’re using a triple or quad battery Mod? Is this correct?

      Unfortunately I’m unsure why your wattage is fluctuating around 20W. Please can you expand on what the problem is or what it is you want to measure?

      Thanks for the comment Ross and hope the information above helps.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.