Higher nicotine isn’t inherently more harmful, but it can feel unpleasant if mismatched with the wrong device.
Choosing the right nicotine strength is one of the biggest things that can make vaping feel comfortable when you switch from smoking. If you go too low, cravings can linger and you may find yourself vaping constantly. If you go too high, it can feel harsh and leave you light-headed.
The aim is straightforward: find a level that keeps cravings under control without making vaping unpleasant. In this guide, we’ll break down how nicotine strengths work, how to match them to your smoking habits, and how to choose a strength that suits both your device and your day-to-day needs.
Table of contents
- What Is Nicotine?
- What Do Nicotine Strength Numbers Mean?
- Nicotine Types and Why They Matter for Strength Choice
- Choosing Nicotine Strength Based on Smoking Habits
- Which Nicotine Strength Is Right For Me?
- How Much Nicotine is Equal to one Cigarette: Nicotine Strength Chart
- Matching Nicotine Strength to Your Vape Device
- Signs Your Nicotine Strength Is Too High or Too Low
- FAQs About Nicotine
- Final Thoughts: Know What You’re Using
What Is Nicotine?
Nicotine is a naturally occurring substance found in tobacco plants. It’s what makes cigarettes addictive, but it isn’t the main reason smoking causes serious health harm, most of that comes from burning tobacco and breathing in the smoke.
With vaping, nicotine comes in the e-liquid at set strengths, so you can choose a level that helps manage cravings as you move away from cigarettes. You can also choose nicotine-free e-liquids if you don’t want nicotine at all.
What Do Nicotine Strength Numbers Mean?
Nicotine strength is measured in milligrams per millilitre (mg/ml). This tells you how much nicotine is in each millilitre of e-liquid. It’s important to remember this number shows the nicotine content of the liquid, not how much your body absorbs - absorption varies depending on your device, inhaling style, and how often you vape.
- 0mg = nicotine-free
- 1mg = lowest nicotine vape
- 3mg = low nicotine
- 5-6mg = light to moderate
- 10–15mg = medium
- 18–20mg = high (UK legal maximum)
Sometimes strengths are shown as percentages:
- 3mg = 0.3%
- 10mg = 1%
- 20mg = 2%
Lower numbers mean less nicotine per puff, higher numbers deliver more.
In the UK, 2% is the legal maximum for e-liquids (20mg). Higher percentages/strengths are not permitted in the UK.
Is 6mg of nicotine a lot?
Not usually. 6mg is generally considered a light to moderate nicotine strength, especially in smaller mouth-to-lung devices, like pod kits. If you feel satisfied after a few puffs and don’t get headaches or dizziness, it’s likely fine. If you’re constantly vaping and still craving, you may need more.
How much nicotine is a lot in a vape?
A lot depends on your device and how you vape, and how strong your cravings are. In the UK 18–20mg is considered a high nicotine level. High strengths are usually best in low-power MTL pod kits, where they feel smoother and more controlled. If you're a smoker we recommend starting with a higher nicotine level than you think you're need and only vape until your cravings are satisfied, then put the kit away. Nic salts are the best option for this as you can vape higher strengths without the harsh throat hit of freebase nicotine.
Nicotine Types and Why They Matter for Strength Choice
Nicotine in e-liquid comes in two main forms: freebase nicotine and nicotine salts. The type you use affects how strong a given strength feels.
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Freebase nicotine delivers a more noticeable throat hit as strength increases and is usually best at lower to mid strengths.
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Nicotine salts absorb more quickly and feel smoother at higher strengths, making them popular with heavier smokers. Because nicotine salts absorb faster, the same strength can feel more satisfying than freebase nicotine, even though the number on the bottle is the same.
You don’t need to understand the chemistry to choose correctly - just know that higher strengths are generally more comfortable in nicotine salts, while lower strengths work well with freebase nicotine.
If you want a deeper explanation, see our Nic Salts vs Freebase Nicotine comparison.
Choosing Nicotine Strength Based on Smoking Habits
A lot of people ask this question, but it’s a bit of a tough one to answer - it depends on the strength of the cigarettes you used to smoke, how many per day, your smoking style and even your body mass and lung capacity. Some people are also naturally more sensitive to nicotine than others, so if a strength that "should" suit your smoking habits feels uncomfortable, it’s fine to adjust.
All of this would need to be weighed up against what concentration of nicotine you have in your e-liquid and what your vaping style is. To give you some idea (we’ll break down the numbers a little more next) your average cigarette has 12mgs of nicotine (though can range from 8mg right up to 20mg), but your body will only absorb a small amount of this, the rest is released back out when you exhale the smoke. Vaping doesn’t deliver nicotine into your system quite as quickly as smoking does either. It’s a bit like coffee and alcohol - what might be normal for one person might be too much or too little for someone else.
This brings us onto the important question - how to choose the best nicotine strength for you.
Which Nicotine Strength Is Right For Me?
The important thing in answering this simply comes down to your smoking habits - look at how many you have a day, think about whether they are a light variety or not and go from there. The strength you use is personal to you - trying a stronger liquid might help you make the switch from smoking to vaping and once you’ve found the right one you can gradually reduce it over time. This approach helps many people quit smoking comfortably first, then step down their nicotine at their own pace.
How Much Nicotine is Equal to one Cigarette: Nicotine Strength Chart
These comparisons are only a rough guide, cigarettes and vapes deliver nicotine differently, so use this chart as a starting point rather than a direct conversion.
Nicotine Strength | Description | Ideal For |
0mg | No nicotine | Social/hobby vapers |
3mg | Very low | Light smokers: 1–5 cigarettes/day |
6mg | Low | Light to moderate smokers: 6–15 cigarettes/day |
10-12mg | Medium | Moderate smokers: 15+ cigarettes/day |
18-20mg | High | Heavy smokers: 20+ cigarettes/day |
Matching Nicotine Strength to Your Vape Device
Nicotine strength also depends on how much vapour your device produces. Your device output changes how strong a nicotine level feels. The same vape juice strength can feel much stronger in a high-power kit that produces a lot of vapour, and more comfortable in a lower-power pod kit designed for higher vape liquid strengths.
Mouth-to-Lung (MTL) Devices
- Low power, cigarette-like draw
- Best with higher nicotine strengths
- Ideal for nicotine salts and 50:50 freebase
Direct-to-Lung (DTL) Devices
- High power, large clouds
- Best with low nicotine strengths (3mg or less)
- Not suitable for high-strength nicotine
Using high nicotine in powerful devices can feel unpleasant very quickly.
Signs Your Nicotine Strength Is Too High or Too Low
Too low:
- Strong cravings
- Constant vaping with little satisfaction
- Urge to smoke
Too high:
- Headache
- Nausea
- Dizziness
- Harsh throat hit
Your body usually tells you quite quickly if your nicotine strength isn’t right, especially when you first switch to vaping.
If symptoms occur, adjust your strength. Vaping should feel controlled and comfortable.
FAQs About Nicotine
Is higher nicotine more dangerous?
Can I vape 0mg nicotine?
Yes, ideal for social or hobby vapers, or those who’ve already quit nicotine.
Is 2% the same as 20mg nicotine?
Yes. 2% nicotine is the same as 20mg per millilitre, the UK legal maximum for e-liquids. Percentages and mg are just two different ways of showing the same strength.
Why do nicotine salts feel stronger?
They absorb faster and feel smoother, not harsher.
What nicotine strength should I vape?
Start with a strength that matches your smoking habits and the type of device you use. Light smokers often feel comfortable at 3mg–6mg, moderate smokers at 6mg–12mg, and heavier smokers may prefer 10mg–20mg (often as nicotine salts in MTL kits). If your cravings remain, increase strength slightly; if it feels harsh or makes you dizzy, reduce it.
What is the lowest nicotine vape?
The lowest nicotine vape option is 1mg e-liquid, which is mostly ideal for social smokers or anyone cutting down gradually. 3mg is the most commonly used low nicotine strength, and 3mg–6mg is often chosen by people who want a low nicotine setup.
What is a high nicotine level in a vape?
In the UK, 18mg–20mg is generally considered a high nicotine level, with 20mg/ml being the standard legal maximum for retail e-liquids. High nicotine tends to work best in low-power, mouth-to-lung devices. Using high nicotine in a powerful kit can feel too strong very quickly.
Nicotine in vape liquid: what should I watch for if it’s too strong?
If your nicotine level is too high, you’ll often notice it quickly as it causes dizziness, nausea, headaches, or a harsh throat hit. If that happens, step down in strength, take shorter puffs, and avoid chain vaping while your body adjusts.
Final Thoughts: Know What You’re Using
Choosing the right nicotine strength isn’t about chasing the strongest hit, it’s about finding the level that keeps cravings away while still feeling comfortable. Start with what matches your smoking habit, use the right device, and adjust gradually.
If you ever feel unsure, it’s better to slightly overestimate than underestimate. You can always step down, but quitting smoking comes first.
Once you’ve settled on the right nicotine strength, the next step is choosing a flavour and format that suits your device. You can browse vape juices that match your nicotine strength and find options designed for both mouth-to-lung and direct-to-lung vaping.
If you’re completely new to vaping, our Beginner’s Guide to Vaping covers the basics of devices and inhaling styles.