The answer to this question depends on the size of the e-cigarette and the amount of nicotine it contains. Generally speaking, a single e-cigarette is equivalent to about 1/2 to 1 pack of cigarettes, depending on the brand and size of the e-cigarette.
The amount of nicotine in an e-cigarette is determined by the strength of the e-liquid used to fill it. Most e-liquid comes in a variety of nicotine strengths, ranging from 0 mg/ml to 24 mg/ml. A single e-cigarette filled with a 0 mg/ml e-liquid would contain no nicotine, while a single e-cigarette filled with a 24 mg/ml e-liquid would contain the same amount of nicotine as a full pack of cigarettes.
In addition to the nicotine strength, the size of the e-cigarette also affects the amount of nicotine it contains. Standard e-cigarettes are typically about the size of a cigarette and contain the same amount of nicotine as a single cigarette. Larger e-cigarettes, such as tanks and mods, can contain up to three times the amount of nicotine as a single cigarette, meaning they can be equivalent to up to 3 packs of cigarettes.
In conclusion, the amount of nicotine contained in an e-cigarette is determined by the size of the e-cigarette and the strength of the e-liquid used to fill it. Generally speaking, a single e-cigarette is equivalent to about 1/2 to 1 pack of cigarettes, depending on the brand and size of the e-cigarette.