Voltage | V | |
Hits limit | V | |
Resistance | Ω | |
Hits lower R limit | Ω | |
Hits upper R limit | Ω |
Current | A | |
Hits limit | A | |
Resistance | Ω | |
Hits lower R limit | Ω | |
Hits upper R limit | Ω |
Resistance range for maximum power W | – | Ω |
Median resistance | Ω | |
Sweet spot | Ω |
The calculator finds the optimal resistance range for your variable voltage or variable wattage advanced personal vaporizer, based on its maximum output current, voltage and power. Select your mod from the presets, or type in its limitations.
Note: Some mod manufacturers exaggerate the specs. Others don't publish the limitations of their products, so data from reviews or forums have to be used instead. Mods also have individual variance. Don't take these numbers as gospel; YMMV. If you have better data, click "How it works" and leave me a message.
This calculator is for figuring out the optimal resistance range for your advanced personal vaporizer, aka. regulated or variable voltage/variable power (wattage) mod, based on its maximum output current, voltage and power.
The minimum resistance you should use is typically determined by the PV's current (amp) limit. The maximum resistance is typically determined by the voltage limit. The median resistance is calculated by ignoring the power limit, and simply dividing the voltage limit by the current limit. The "sweet spot" is between the median and the maximum resistance. Keeping the resistance of your atomizer close to the "sweet spot" of your APV should give you a decent adjustment range (with most APVs), without necessarily pushing the mod to its limits.
The limits of some mods can be difficult to find on the 'net, and often conflicting information can be found. Some manufacturers exaggerate the capabilities of their products. If you find any errors in the preset values, please drop me a note, and I'll try to correct or nuance the presets. Remember to state your sources.
Different mods and regulating circuits have different efficiency levels at various voltages. The efficiency is typically between 80% and 95%, but it can be lower. With the power output being constant, it is the efficiency of the circuit that determines how long your battery will last. There is no obvious way to know if your device is more battery efficient at lower or higher resistances, unless the manufacturer actually provides the data (most of them don't). The efficiency characteristics of a particular regulator is usually figured out by hooking it up to a test rig, or through good old fashioned user experience.