Ohms and Wattage 101

Posted by Matt O'Donnel on Oct 11th 2016

Ohms and Wattage 101

Educate yourself on Ohms & Watts

When it comes to vaping, many people have questions about different coils and wicks and the Ohms and wattage they can support. Some of these questions are “How high can I run the watts?” or “Why won’t my device work with the coils I built?” I am here to help.

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. When it comes to ohms for devices, the higher the resistance, the slower the coils will heat up. This allows you to use a higher nicotine level. This is great for beginners that are trying to quit the habit. The lower the ohm, the lower the resistance, which means the coils will be able to handle the high wattage power. This is where you see the people blowing big clouds. This requires a low nicotine juice, since the coils heat up about 4x faster, producing 4x the amount of vapor.  

Below is a table further explaining the calculations of Ohm’s Law. I am going to use cars as a reference.
Mathematical Symbol Measurement Simple Term Analogy
V Volts Force Speed
I Amps Current Qty of cars
R Ohms Resistance Qty of lanes
P Watts Power Traffic or Heat / Speed x Qty of cars

The Battery for your Mod

Just like your car engine, your vape battery can only do so much. They have a limit of how much power they can push out. If you are trying to overwork your battery, just like a car engine, it will blow out. This is why most devices will not fire a coil below a 0.15 Ohm coil. The resistance is much too low, which can be dangerous for most batteries. Knowing your Ohms and wattage rules can save you a lot of headaches when it comes to batteries.  See our full line of batteries.

Now, for those who are trying to quit smoking, you need a high resistance (Ohm) coil. As mentioned before, the high nicotine levels need to be vaporized slower. This will make the device hit more like a cigarette and you will get the full effect from the nicotine. These POSITIVE OHM coils (anything 1.0+) are run on low wattage (between 3-20watts). They do not need much power in order to heat up. On the other hand, Sub-Ohm coils (Anything 0.9 and below) need to run at higher wattage since they require more power.

This chart represents the wattage you can run particular ohm coils on.ohm table for vapers

Series 1 (dark blue) is a 0.5ohm coil which can be run safely up to 40watts.

Series 3 (green) is a 1.2 ohm coil, which is safe to run at 20watts.

Series 5 (light blue) is a 1.8-2.0 ohm coil which is safe anywhere between 3-5watts.

Knowing about Ohms and wattage is a HUGE step in your vaping education and is one of the stepping stones to becoming an expert. Do you have more questions about ohms and wattage? Leave them in the comments below and we'll do our best to answer them!