A Vapers Guide To Voltage, Wattage And Ohms

It’s always a good idea for vapers to know the science behind their vape devices.


Although many vapers can get by without having the foggiest about wattage ohms and voltage, it wouldn’t hurt to learn a little. This is especially true if you’d like to find your very own sweet spot when you vape. Finding the right power settings when sub ohm vaping is a must for the long term of vape satisfaction. Understanding the triptych of ohm’s law is a great idea for anyone who wants to learn the secrets of vaping.


What is ohms law?

The sum wattage equals voltage over resistance means that the triptych of electrical measurements can be used to find the missing measurement through a sum of the other two. The great thing about this formula is that it gives you, as the vaper, the ability to work out what you need in terms of your vape devices resistance, and electrical current. The sum itself was created not only for vape devices, but for electrical currents within devices in general, whether that be early batteries or even light bulbs. The sum was created by George Ohm, a German physicist using simple electrical circuits to study the effects of varying constructions.


What do people use ohm’s law for?

Ohm’s law is used in the modern day for almost everything electrical. Most appliances are configured with ohm’s law in mind. Of course, vape devices fall under this umbrella, and if you really want to take the literal power back into your hands when finding your perfect device in your local vape shop, then understanding the law is insurmountably helpful.



Voltage refers to the electric potential difference or tension in an electrical circuit. This difference is the same sum as the work done per unit of charge and measure the electric circuits potential. Being equal to the work done per unit of charge, this measurement is useful in understanding vaping and the power created through the wattage and ohms. A circuits voltage can be caused by static electric fields, currents through magnetic fields and even a combination of all of these. In simple terms, voltage is the unit of measurement for the energy created by a combination of the charge and the resistance to that charge. The result of these two colliding, is the voltage.



Wattage refers to the amount of power consumed by an electrical device. You can find out the watts of a circuit through dividing the resistance by the voltage, making it a useful sum to have when finding out your vape devices potential. The wattage can be found on the displays of most vape devices. You can usually change the wattage of your vape device to suit your taste and amount of vapor production.



The resistance, or ohms of a vape device refer to how large or small a flow of power is allowed through your device. This is often rather variable, especially in sub ohm vaping. Sub ohm vaping allows you to bring your resistance down to under one ohm, meaning that vapor production is increased dramatically. With this, you can create larger vape clouds and enjoy mouth to lung vaping with ease. To lessen your resistance, you can also use larger coils with more surface area. These larger coils will allow more electricity to pass through at once, thus increasing your vapour production



mAh’s are related to sub ohm vaping as they are the measurement with which you can assess how long your battery will last for. The larger the mAh, the longer they’ll last, which is great for sub ohm vapers, who will be using more power due to the lessened resistance.


What resistance is best for me?

It’s entirely up to the user. Some users prefer large, almost overwhelming vape clouds which are inhaled directly into your lungs due to how much you are taking in. With the amount of vape juice which is used in sub ohm vaping, some prefer the more economical option of above ohm vaping. This uses less vape juice and has a more subtle inhale, allowing you to vape for longer and if you wish, discreetly.


Variable voltage and variable wattage

The two different uses of your temperature control settings come down to variable voltage or variable wattage devices. A variable voltage device will allow you to control the amount of power going through your device. The variable wattage on the other hand, lets you control how much power is output, not flowing through your device to interact with the atomiser. The variable wattage therefore, is great for those who want to know exactly what they’re getting out of their device, not how much power is going through it. Of course, this means you are responsible for not shorting your device, so finding the right balance between your power output and the resistance of your device is key for this. And you know what that means understanding? Ohm’s law! Don’t you just love it when things come full circle? Or in this case, full circuit.