Pick the wrong nicotine strength and your first month of vaping will be miserable. Pick the right one and you'll forget about cigarettes within a week. This guide tells you exactly which strength suits you, why pod kits and box mods need different formats, and how to step down if you want to.
UK Nicotine Strengths at a Glance
E-liquid in the UK is sold in six standard strengths. The legal maximum is 20mg/ml under TPD rules.
| Strength | Format | Best for | Cigarettes/day equivalent |
|---|---|---|---|
| 0mg | Shortfill, pre-filled pods | Quitting nicotine entirely | 0 |
| 3mg | Freebase shortfill | Sub-ohm box mods, very light users | 1–5 |
| 6mg | Freebase shortfill | Sub-ohm + occasional smokers | 5–10 |
| 10mg | Nic salt 10ml | Pod kits, moderate smokers | 10–15 |
| 18mg | Freebase 10ml | Older-style pen kits | 15–20 |
| 20mg | Nic salt 10ml / pre-filled pods | Pod kits, heavy ex-smokers | 20+ |
How to Pick Your Strength
If you smoked 20+ cigarettes a day
Start at 20mg nic salts. This matches the rapid nicotine delivery of a cigarette and is the closest replacement for what disposables used to provide. Step down only after a month or two if it feels too strong.
If you smoked 10–20 a day
10mg or 20mg nic salts. Try 20mg first; if it feels harsh or makes you light-headed, drop to 10mg.
If you smoked under 10 a day
10mg nic salts is plenty. Anything higher will likely feel unpleasant.
If you only ever smoked socially
3–6mg freebase in a refillable pod or small sub-ohm kit. You may even start at 0mg if you only crave the ritual.
If you're an ex-disposable user
Stay at 20mg nic salts. Disposables were almost universally 20mg — anything lower will feel like a step backwards.
Nic Salts vs Freebase: Why It Matters
Same nicotine, different chemistry, very different experience.
- Nic salts — lower pH, much smoother throat hit at high strengths. Absorbs in 1–2 minutes. Perfect for pod kits at 10mg or 20mg. Match to a disposable's hit.
- Freebase — higher pH, harsher hit at high strengths. Absorbs in 5–8 minutes. Perfect for sub-ohm box mods at 3–6mg.
The rule of thumb: if it fits in your pocket, you want nic salts. Full explainer: nic salts vs freebase e-liquid.
How Strong Is a 20mg Vape vs a Cigarette?
One 10ml bottle of 20mg nic salt contains around 200mg of nicotine total. A single cigarette delivers roughly 1–1.5mg of nicotine to your bloodstream. A pack of 20 cigarettes therefore delivers 20–30mg of bioavailable nicotine across a day.
A 10ml bottle of 20mg nic salt typically lasts a heavy vaper 3–5 days — broadly matching a pack-a-day cigarette habit, but at a fraction of the cost (see cheapest way to vape in 2026).
Device + Strength Matching
| Device type | Wattage range | Recommended strength & type |
|---|---|---|
| Pre-filled pod kit (Hayati, Lost Mary) | 10–15W | 20mg nic salt (pre-filled) |
| Refillable pod kit (XROS, Caliburn) | 10–20W | 10–20mg nic salt |
| MTL pen vape | 10–15W | 18mg freebase or 10–20mg nic salt |
| Sub-ohm box mod | 30W+ | 3–6mg freebase shortfill |
How to Step Down Your Nicotine Strength
Some vapers want to gradually reduce nicotine over time. The safe approach:
- Spend 1–2 months at your starting strength before stepping down.
- Drop by one step at a time (e.g. 20mg → 10mg).
- If cravings come back, step back up — no shame in it.
- Once you're comfortable at 10mg, you can step to 6mg freebase in a refillable pod kit.
- From 6mg, 3mg, then 0mg if you want to come off nicotine entirely.
Signs You're on the Wrong Strength
Too high
- Light-headedness or dizziness
- Nausea
- Harsh throat hit even on gentle draws
- Headache
Too low
- Chain-vaping all day
- Cigarette cravings returning
- Vaping but still smoking
- Hit feels "like nothing"
Both are easy to fix — you just change your next bottle, not your kit.
The 2026 Vape Tax and Nicotine Strength
The new Vaping Products Duty (from 1 October 2026) is a flat £2.20 per 10ml regardless of nicotine strength. A 0mg bottle costs exactly the same in duty as a 20mg bottle. So picking the right strength for you is purely about effectiveness, not cost.
Frequently Asked Questions
Is 20mg too much for a beginner?
Not if you smoked regularly. 20mg nic salt is designed for ex-smokers and feels smooth despite being the legal maximum. It's the same strength disposables used.
What's the strongest legal vape in the UK?
20mg/ml. Anything higher is illegal under UK TPD rules.
Can I mix two different strengths?
Yes. Mixing equal parts 10mg and 20mg gives you a 15mg blend. Just keep within the legal max of 20mg in the final bottle.
Why does my 20mg vape feel weaker than my 18mg one used to?
You're probably comparing a 20mg nic salt with an 18mg freebase. Freebase is harsher at the same strength, which feels "stronger". Switch to a higher-PG nic salt if you want more throat hit.
Can I overdose on nicotine from vaping?
It's effectively impossible to overdose from vaping alone — your body naturally limits intake when you've had enough (you'll feel light-headed and stop). The risk is from swallowing e-liquid — always keep it locked away from children and pets.
Should I match my partner's strength?
No — match your own smoking history. A non-smoker vaping 20mg will feel ill; a heavy smoker vaping 3mg will be miserable.
Quick-Reference: Our Recommended Strengths
- Ex-pack-a-day smoker → 20mg nic salt in a pre-filled pod kit (Hayati Pro Max+ 6K)
- Ex-10-a-day smoker → 10–20mg nic salt in a refillable kit (Vaporesso XROS Mini Retro + Vampire Vape Nic Salts)
- Social smoker → 10mg nic salt in a small refillable kit
- Cloud chaser, not quitting → 3mg freebase shortfill in a sub-ohm box mod
Find your strength at Isle of Vapes. 10mg and 20mg nic salts from £2.24 (4 for £10). Browse e-liquids and pre-filled pods. Free UK delivery over £20.
For smokers aged 18+. Nicotine is addictive. Last updated June 2026.
