There is no certain answer, and the different sources that provide one are in strong disagreement. A 2 mL disposable item from Canada’s 20 mg/mL limit contains 40 mg of nicotine, and according to the assumptions you make, the published estimates range from 20 to 40 cigarettes. Health Canada’s own advice says that vaping products “can deliver more or less nicotine than a cigarette”. The maths is straightforward; it only measures that.
There is no certain answer, and the different sources that provide one are in strong disagreement. A 2 mL disposable item from Canada’s 20 mg/mL limit contains 40 mg of nicotine, and according to the assumptions you make, the published estimates range from 20 to 40 cigarettes. Health Canada’s own advice says that vaping products “can deliver more or less nicotine than a cigarette”. The maths is straightforward; it only measures that. If you are looking for a broader overview of how these products work, their types, regulations, and key considerations, see our guide to disposable vapes in Canada.
The Arithmetic Everyone Uses
The usual method involves three steps.
1. Total nicotine in the device. Multiply e-liquid volume by concentration. A 2 mL device at 20 mg/mL holds 40 mg.
2. Nicotine absorbed from one cigarette. A cigarette contains roughly 8 to 20 mg of nicotine in the tobacco, but published estimates of how much a smoker actually absorbs cluster around 1 to 2 mg.
3. Divide. 40 mg ÷ 1–2 mg gives a range of roughly 20 to 40 cigarettes.
That is where the commonly repeated “a disposable equals a pack or two” figure comes from.
Why the Answer Varies So Much
When the same device is looked at in published sources, using a volume of 2 mL at a concentration of 20 mg/mL, the results given are 20 to 40 cigarettes, 25 to 30 cigarettes, “one or two packs”, and “two packs”. The same device yields four different answers. The reason for the variation is that the calculation is based on assumptions which in turn are themselves a range.
It compares content against absorption. The device figure is how much nicotine is inside. The cigarette figure is how much a person takes in. Those are different measurements, and dividing one by the other produces a number that doesn’t describe either accurately.
Cigarette nicotine content varies by more than double, from roughly 8 to 20 mg, before any absorption estimate is applied.
Vaping absorption varies by device and by person. Draw length, draw style, device power, whether the liquid uses nicotine salt or freebase, and individual physiology all change how much nicotine actually reaches the user. Nicotine salts are absorbed more readily than freebase at the same concentration.
Nobody finishes a device in one sitting. A pack of cigarettes is a day’s consumption for a pack-a-day smoker. A 20,000-puff disposable is weeks of use. Expressing the second as a number of packs invites a comparison that doesn’t map onto how either product is actually used.
What Happens With Larger Devices
The equivalence maths that has been published generally refers to a 2 mL device, this being the legal maximum in both the UK and the EU. In Canada the volume of the e-liquid is not capped, only the concentration of nicotine being regulated, which is why devices found in the country are often much larger, ranging from 8 mL, 20 mL, or 22 mL in the case of two-stage devices.
If you carry out the same calculation using a 20 mL device at a concentration of 20 mg/mL, you obtain a total nicotine content of 400 mg, a figure that the standard method would put as equivalent to 200 to 400 cigarettes. Although the figure is arithmetically correct it has no practical significance, thus more clearly showing the flaw in the method than any warning could do. To find out what the capacity figures actually tell you, see our guide to e-liquid capacity.
What the Comparison Is Useful For
The equivalence figure is only a rough estimate of the total nicotine content in a sealed device and provides no further information; it doesn’t indicate how much nicotine you will absorb, how the experience will compare, or anything regarding relative health risks. Health Canada’s advice on the risks of vaping looks at this separately, and our page on what the evidence says about vaping risks contains that information.
The cap of 20 mg/mL in Canada is a limit on concentration, not one on the total quantity, something which our nicotine strength explainer discusses in full.
Sources
FAQs
How many cigarettes is a 2 mL disposable equal to?, By total nicotine content, published estimates range from about 20 to 40 cigarettes. The range is wide because it depends on assumptions about how much nicotine a smoker absorbs per cigarette, which itself varies.
How many puffs equal one cigarette?, Figures circulate in the range of 10 to 20 puffs, but these rest on the same uncertain assumptions as the nicotine maths and vary with draw length and device.
Does a 20 mg/mL vape deliver more nicotine than a cigarette?, Health Canada states that vaping products can deliver more or less nicotine than a cigarette, depending on the product and how it is used.
Why do different websites give different answers?, Because the calculation compares nicotine content in a device against estimated nicotine absorption from a cigarette, and both figures are ranges rather than fixed values.
