What Nicotine Strength Should I Vape? UK Beginner's Guide
Picking the wrong nicotine strength is one of the quickest ways to put someone off vaping for good. Go too strong and you get a harsh throat hit or a headache. Go too weak and you're left unsatisfied, reaching for more puffs or, worse, reaching for a cigarette instead. This guide walks through exactly how UK nicotine strengths work, how to match one to your old smoking habit, and how strength changes depending on whether you're using nic salts or shortfills. By the end you'll know exactly what to buy on your first order and how to adjust it as you go.
Quick Summary
UK e-liquids are legally capped at 20mg (2%) nicotine. Most vapers land somewhere between 3mg and 20mg depending on how much they used to smoke. As a rough guide: light smokers (under 10 a day) usually suit 3-6mg, moderate smokers (10-20 a day) suit 10mg, and heavy smokers (20+ a day) usually need 20mg nic salt to feel properly satisfied. Nic salts feel smoother at high strengths than standard e-liquid, which is why most pod kits use them. If you're vaping shortfills in a sub-ohm setup, you'll want a much lower strength, usually 0mg to 6mg, since the vapour volume is far higher per puff.
UK Nicotine Strength Rules: What You're Actually Allowed to Buy
Under the Tobacco and Related Products Regulations, no e-liquid sold in the UK can legally exceed 20mg per ml (2%) nicotine. This applies whether it's a bottle of nic salt or a bottle of freebase e-liquid, and it applies to prefilled pods too. Anything claiming to be stronger than 20mg being sold in the UK isn't legal, so it's worth being cautious of anything imported from outside the country that claims a higher strength.
Bottle sizes are also regulated. Nicotine-containing e-liquid must be sold in bottles no larger than 10ml if it contains nicotine, which is why nic salts come in small 10ml bottles while shortfills are sold nicotine-free in larger bottles (like 50ml or 100ml) with separate 10ml nicotine shots you add yourself.
How to Choose Your Starting Nicotine Strength
The single biggest factor in picking the right strength is how much you used to smoke, if you're coming from cigarettes, or how strong you want the hit to feel if you've never smoked before.
| Smoking habit | Recommended nic salt strength | Recommended shortfill strength |
|---|---|---|
| Light smoker (under 10/day) | 3mg-6mg | 0mg-3mg |
| Moderate smoker (10-20/day) | 10mg | 3mg-6mg |
| Heavy smoker (20+/day) | 20mg | 6mg (rarely higher) |
| Roll-up or strong tobacco smoker | 20mg | 6mg |
| Never smoked, want a mild hit | 0mg-3mg | 0mg |
These are starting points, not fixed rules. If 10mg nic salt feels too weak after a week, there's nothing wrong with moving up to 20mg. Equally, if 20mg feels harsh on your throat, dropping to 10mg is completely normal. Most vapers settle into their ideal strength within the first month.
Nic Salts vs Freebase: Why Strength Feels Different
Nicotine strength isn't just a number, how it feels depends heavily on the type of e-liquid it's in.
Nicotine salts
Nic salt e-liquids use a naturally occurring form of nicotine that's been chemically modified to be gentler on the throat. This means a 20mg nic salt feels far smoother than 20mg of standard freebase nicotine would. Nic salts are absorbed into the bloodstream faster too, which is part of why they feel more satisfying at higher strengths and why they're the standard choice for MTL pod kits.
Freebase (standard) e-liquid
Freebase nicotine is the traditional form used in most bottled e-liquids and shortfills. It has a harsher throat hit at higher strengths, which is why shortfills rarely go above 6mg. It's slower to absorb but the throat hit itself is more pronounced, which some vapers actually prefer, particularly in DTL sub-ohm setups where the bigger vapour volume needs a lower nicotine strength anyway to avoid feeling overwhelming.
Nicotine Strength by Vaping Style
How you vape changes how much nicotine actually reaches you per puff, which is why strength recommendations differ so much between device types. If you haven't already, it's worth reading our MTL vs DTL vaping guide alongside this one, since the two topics are closely linked.
MTL (Mouth to Lung)
Smaller, more frequent puffs with less vapour per draw. Needs a higher nicotine strength (10mg-20mg nic salt) to deliver enough nicotine per puff. This is the standard setup for pod kits and most ex-smokers.
DTL (Direct to Lung)
Larger, deeper puffs with far more vapour per draw. Needs a lower nicotine strength (0mg-6mg) since so much more vapour is inhaled per puff. Common with shortfills and sub-ohm kits.
Stepping Down Your Nicotine Strength Over Time
Plenty of vapers use vaping as a way to gradually cut nicotine altogether rather than staying at one strength forever. If that's your goal, a slow step-down approach tends to work better than a sudden drop.
- Settle in first. Spend at least 4-6 weeks at your starting strength before changing anything. You want vaping to feel satisfying before you start reducing.
- Drop one level at a time. Move from 20mg to 10mg, not straight to 0mg. A jump that's too big usually backfires and leads people back to a higher strength or back to cigarettes.
- Give each level a few weeks. Let your body adjust before dropping again. There's no rush.
- Consider switching formats as you go. Some vapers move from nic salts to shortfills as they reduce strength, since freebase e-liquid tends to suit the lower end of the scale (0mg-6mg) better than nic salts do.
If your main goal is quitting nicotine completely rather than just quitting cigarettes, it's worth knowing that nicotine pouches are another option some people use during the final stages of stepping down, since they let you control dosing without any vaping device at all.
Find Your Right Strength
Browse nic salts by strength or shop shortfills and nic shots, all in stock with fast UK delivery.
Shop 10mg Nic Salts Shop 20mg Nic Salts Shop ShortfillsCommon Mistakes When Choosing Nicotine Strength
Buying the strongest option "just to be safe"
More nicotine doesn't automatically mean more satisfaction. Going in too strong is one of the most common reasons new vapers report feeling sick, dizzy, or getting a headache in their first week. Start with the recommendation for your smoking habit rather than jumping straight to 20mg.
Using the same strength across every device
A 20mg nic salt that's perfect in a small MTL pod kit would feel far too strong in a high-powered sub-ohm tank, simply because of how much more vapour the sub-ohm device produces per puff. Match your strength to the device, not just to what worked before.
Sticking with a strength that isn't working
If you're still craving cigarettes weeks into vaping, your nicotine strength is probably too low, not your willpower. Most people need to adjust their strength at least once in the first month before landing on the right one.
Frequently Asked Questions
What is the strongest nicotine strength you can buy in the UK?
The legal maximum in the UK is 20mg per ml (2%). This applies to all e-liquids, nic salts, and prefilled pods sold legally in the UK, regardless of brand.
What nicotine strength should a pack-a-day smoker use?
Most smokers who get through 20 or more cigarettes a day suit 20mg nic salt. This delivers enough nicotine per puff to satisfy a heavy smoking habit without needing to vape constantly throughout the day.
Is 3mg or 6mg enough for someone who used to smoke?
It depends how much you smoked. 3mg-6mg tends to suit light smokers (under 10 cigarettes a day) or vapers using high-vapour DTL setups. Heavier smokers usually find 3mg-6mg too weak and end up unsatisfied, which often leads people back to cigarettes.
Can I use 20mg e-liquid in a sub-ohm tank?
Technically yes, but it's not recommended. Sub-ohm and DTL devices produce far more vapour per puff than MTL devices, so 20mg nicotine at that vapour volume can feel harsh, cause headaches, or even nicotine sickness. Stick to 0mg-6mg for sub-ohm and DTL setups.
Why does 20mg nic salt feel smoother than 20mg regular e-liquid?
Nic salts use a modified form of nicotine that's gentler on the throat at higher concentrations compared to freebase nicotine used in standard e-liquids and shortfills. That's why nic salts can comfortably go up to 20mg while shortfills rarely exceed 6mg.
Should I lower my nicotine strength over time?
Many vapers do, particularly if the long-term goal is to reduce nicotine dependence altogether. A gradual step-down, dropping one strength level every few weeks, tends to work better than a sudden jump to 0mg.
What strength should I use if I've never smoked before?
If you're new to nicotine entirely, start low, around 0mg to 3mg, and only increase if you find you want a stronger hit. There's no need to start at a smoker's strength if you've never smoked.
Do nicotine pouches use the same strength scale as vapes?
No, nicotine pouches are measured in milligrams per pouch rather than milligrams per ml, so the numbers aren't directly comparable to e-liquid strengths. They're a separate category worth researching on their own if you're considering them.
How do I know if my nicotine strength is too high?
Common signs include a harsh or burning throat hit, feeling lightheaded or dizzy, mild nausea, or a headache shortly after vaping. If you notice any of these, try dropping down one strength level.
The Bottom Line
There's no single correct nicotine strength, only the right one for your situation. Match it to how much you used to smoke, the type of device you're using, and whether you're vaping nic salts or freebase e-liquid, and adjust from there. Most vapers need at least one tweak in their first few weeks before landing on their ideal strength, so don't be afraid to experiment.
Browse the full range of nic salts by strength, stock up on shortfills and nic shots, or read our MTL vs DTL guide to make sure your device and strength are working together properly.