A Guide To Ohm Resistances

What is Ohms Law?

An ohm is a unit of measurement of electrical resistance, and each e-cig coil has a level of ohm. There are many differences between high and low ohm coils, and even more differences with sub-ohm coils (less than 1.0 ohm coils).

The wire you're vaping with has an electrical resistance value, which affects your vaping experience. The lower the Ohm resistance, the higher your coil output is. This feeds into Ohm's Law, the law that determines the relationship between the battery, wire resistance and current, I.E, Voltage (V) Volts, Current (I) Amps & Resistance (R) Ohms. To calculate wattage, voltage and current are multiplied together.

Ohm Resistance in Vaping

There is no right answer here - the choice of ohm is down to the preference of the vaper. With lower ohm coils, you will experience an increased and warmer level of vapour, ideal for what's called cloud-chasing. Essentially, the greater the ohm resistance, the less electricity flows through the coil. The lower the ohm resistance, the more electricity flows through the coil. You may also find that you're vaping through e-liquid at a faster rate than with higher ohm coils, may need to replace coils more frequently and could be going through batteries more quickly. With higher resistance coils, your e-juice and battery life will be considerably longer, but you will be vaping a reduced, cooler vapour.

Users who have just quit smoking and are taking up vaping might feel most comfortable with higher ohm coils to begin with, with PG-heavy setups as this replicates the smoking sensation better. Advanced vapers who are looking for massive vapour will prefer lower ohm coils or even sub-ohm coils (see What Is Sub-Ohm Vaping?). Contrary to some beliefs, ohms don't really impact flavour. The quality of the e-liquid and components has a bigger impact on the flavour the vaper experiences, although ohms may have the slightest effect.