Heated tobacco is the most common entry point into vaping that nobody writes about. Someone who has used a heat-not-burn device for two years is not a beginner smoker and not a beginner vaper — they have a settled habit, a specific nicotine intake and a mouth-feel expectation that a disposable does not automatically match. Getting the strength right is the difference between a smooth switch and a week of feeling under-fed or over-fed.
This guide maps a heated-tobacco habit onto a vape strength, using the numbers on the packs rather than guesses.
Start with what a stick actually delivers
Heated tobacco sticks are regulated as tobacco products, and the nicotine yield is declared per stick. In the EU the declared figure for the main brands sits around 0.5 mg per stick, with a regulatory ceiling of 1 mg. That is lower than a conventional cigarette, which typically declares 0.6–1.0 mg.
The declaration is a machine-smoked yield, not the amount a person absorbs. Absorption from heated tobacco is generally lower than from combustion because the aerosol is cooler and the particle distribution differs, but the declared figure is still the only consistent starting point. Assume you absorb something like 60–80% of the declared yield, and treat that as an estimate rather than a measurement.
| Sticks per day | Declared nicotine | Estimated absorbed |
|---|---|---|
| 5 | 2.5 mg | 1.5–2 mg |
| 10 | 5 mg | 3–4 mg |
| 15 | 7.5 mg | 4.5–6 mg |
| 20 (one pack) | 10 mg | 6–8 mg |
| 30 | 15 mg | 9–12 mg |
Now convert that into a device
A disposable's total nicotine is simple arithmetic: volume in millilitres multiplied by strength in mg/ml. A 2 ml device at 20 mg/ml holds 40 mg. A 10 ml device at 20 mg/ml holds 200 mg. The absorbed fraction is typically 40–60% for a disposable, because some aerosol is exhaled and some condenses in the airway.
So a 2 ml, 20 mg/ml device delivers something in the region of 16–24 mg of absorbed nicotine across its life. Compared with a pack-a-day heated-tobacco habit at 6–8 mg, one pod is roughly two to three days of your old intake. That is the number to hold in your head — not the puff count, which is a liquid-volume proxy and says nothing about strength.
| Old habit | Daily absorbed nicotine | Device life at 2 ml / 20 mg |
|---|---|---|
| 5 sticks/day | 1.5–2 mg | 8–12 days |
| 10 sticks/day | 3–4 mg | 4–6 days |
| 20 sticks/day | 6–8 mg | 2–3 days |
| 30 sticks/day | 9–12 mg | 1.5–2 days |
If your actual device life is much shorter than the table predicts, you are either drawing harder than the reference or using a lower strength than you think. The percentage to mg conversion is the place to check the label.
Which strength to start at
The mapping is not one-to-one, because heated tobacco and vaping deliver nicotine at different speeds. Heated tobacco gives a slower, more sustained rise across a five-minute session. A vape gives a faster bolus per puff with a shorter tail. That difference means a vaper can feel satisfied at a lower total intake, or feel under-served at the same intake if the delivery is too slow.
Working from the tables, three bands cover most people:
- Under 10 sticks a day: 10–11 mg/ml is usually enough. A 2% device will feel strong at first and is easy to over-use.
- 10–20 sticks a day: 20 mg/ml, which is the EU ceiling, is the common landing point. It matches the intake and the throat expectation.
- Over 20 sticks a day: 20 mg/ml, with a device you actually finish rather than one you nurse. The limiting factor is how much you vape, not the strength ceiling.
Note that 20 mg/ml is the maximum permitted in the EU, so the top band has no headroom. If 20 mg/ml at normal use leaves you feeling under-fed, the answer is more frequent use or a higher-wattage device, not a stronger liquid. The reason high strengths feel harsher is covered in why higher nicotine tastes different.
The three things that actually break the switch
1. Draw style
Heated tobacco is a mouth-to-lung habit: a short draw into the mouth, then inhale. Most disposables are designed for the same technique, which is why the transition usually works. A device with wide-open airflow rewards a direct-lung draw instead, and a former heated-tobacco user will find it harsh and unsatisfying. If the draw feels wrong, close the airflow down before changing the strength. Our guide to MTL versus DL draws explains the mismatch.
2. Throat hit
Heated tobacco produces a dry, tobacco-forward sensation. Nicotine salt liquids — which is what almost every disposable uses — are smoother at the same strength. The result is that the vape feels weaker even when the nicotine is higher, and the reflex is to puff more. This is the most common cause of over-consumption in the first week. The salt versus freebase comparison explains why, and what changes if you move to a refillable system.
3. Session length
A stick has a defined end: it runs out after about six minutes or fourteen puffs. A disposable has no end signal, so a session that used to last six minutes can stretch to twenty without anyone noticing. Our guide to the first week of switching covers how to reintroduce a natural stopping point.
What to do in week one
- Buy one device at 20 mg/ml and one at 10–11 mg/ml. Use the higher one when a craving is sharp, the lower one for habitual puffs.
- Keep the device out of reach between sessions, the way a pack of sticks is not left open on the desk.
- Do not judge the switch on day two. Taste and throat sensation adapt over roughly a week.
- Track device life rather than puff count. If a pod lasts less than the table predicts, you are over-drawing; if it lasts much longer, the strength is probably higher than you need. A pod that vanishes in one evening is usually the alcohol effect rather than a strength problem.
Most people settle within two weeks. The ones who struggle are usually fighting a strength mismatch rather than a flavour one, which is why the arithmetic above is worth five minutes before the first order. If you later want to reduce, the step-down guide sets out a pace that does not produce a week of irritability.
Frequently asked questions
Is one vape pod equivalent to a pack of sticks?
Roughly, for a 2 ml device at 20 mg/ml against a 20-stick day — but the delivery profile differs, so treat the equivalence as a budgeting tool rather than a substitution rule.
Why does vaping feel weaker than heated tobacco at the same strength?
Nicotine salt is smoother on the throat, and the aerosol is cooler. The nicotine may be identical; the sensation is not.
Can I use 20 mg/ml if I only used five sticks a day?
You can, but you will probably use the device less often than you expect. Starting lower and moving up is easier than starting at the ceiling and feeling over-stimulated.
Do heated-tobacco users need freebase liquid?
Some prefer it for the throat hit. It is a reasonable experiment if salt feels too soft, but it is not required.
How is strength regulated in the EU?
Nicotine-containing vaping products are capped at 20 mg/ml under TPD Article 20, with additional rules on volume, labelling and notification. The framework is summarised in our TPD Article 20 explainer.
