Choose the Right Nicotine Strength for Your Vape Juice
Choosing the wrong nicotine strength for your vape juice is one of the most common mistakes new vapers make, and it can completely ruin the experience. Too low and you'll be reaching for a cigarette within the hour. Too high, and every puff will leave you feeling dizzy and rough. Get it right, though, and vaping becomes a genuinely satisfying alternative that keeps the cravings away all day. This guide covers everything you need to know, from understanding milligrams to matching your nicotine level to your device, so you can make the right choice from the start.
What Is Nicotine Strength in Vape Juice?
Nicotine strength in vape juice is measured in milligrams per millilitre (mg/ml). Common strengths in the UK are 0mg, 3mg, 6mg, 10mg, and 20mg. The right nicotine strength depends on how heavily you smoked, the type of device you use, and whether you prefer freebase nicotine or nicotine salts. Most smokers switching to vaping start at 10mg or 20mg nic salts.
Every bottle of e-liquid sold in the UK has its nicotine content listed in mg/ml on the label. This tells you how much nicotine is dissolved in every millilitre of liquid. A 20mg e-liquid contains 20 milligrams of nicotine per ml. That's the maximum legal limit in the UK under TPD regulations, which also cap bottle sizes at 10ml for nicotine-containing liquids.
The strength you choose directly affects two things: how satisfied you feel after vaping, and how harsh the throat hit is. A higher nicotine level delivers more of a kick with each puff, which is what ex-smokers often crave. A lower level gives a smoother experience better suited to casual vapers who want flavour without a strong hit.
Nicotine Strength Guide: Which Level Is Right for You?
There's no single answer for everyone, but your previous smoking habits are the best starting point. Here's how to match your vape juice nicotine strength to your situation:
0mg — Nicotine-Free Vaping
Zero-nicotine shortfill e-liquids are for vapers who've already stepped down their nicotine intake and want to continue enjoying the act of vaping without any nicotine dependence. They're also great for cloud chasers who use high-powered sub-ohm devices where the nicotine strength would be far too intense. If you never smoked but enjoy vaping, 0mg is your starting point.
3mg and 6mg — Light to Moderate
These strengths suit vapers who were light smokers (under 10 cigarettes per day) or those who have already stepped down from a higher nicotine level. A 3mg e-liquid or 6mg e-liquid works well in sub-ohm devices that produce large clouds, since more vapour is inhaled per puff. At these levels, the throat hit is noticeably softer and the flavour profile often comes through more clearly.
10mg — The Middle Ground
This is a popular choice for moderate smokers who smoked around 10 to 15 cigarettes a day. At 10mg, there's enough nicotine to keep cravings at bay without being overpowering. Many vapers who started at 20mg step down to 10mg after a few weeks once their body adjusts to getting nicotine through vaping rather than smoking.
20mg — Heavy Smoker's Starting Point
If you smoked 20 or more cigarettes a day, a 20mg nicotine level is almost certainly where you need to start. This is particularly true for nicotine salts, which deliver nicotine much faster and more efficiently than freebase nicotine, closely mimicking the speed of a cigarette. At this strength, nicotine cravings are satisfied quickly and the urge to reach for a cigarette fades significantly.
Nic Salt 10ml E-Liquids
Fast-absorbing nicotine salts in 10mg and 20mg. Smooth throat hit, brilliant flavours. Ideal for pod kits and mouth-to-lung devices.
Shop Nic Salts
Freebase Nicotine E-Liquids
Classic freebase nicotine in 0mg, 3mg and 6mg. Perfect for sub-ohm kits and vapers stepping down from higher strengths.
Shop Freebase E-LiquidsNot sure which nicotine strength to start with? Browse our full range of premium e-liquids UK at Scent Vape, with options in every nicotine strength from 0mg to 20mg. We offer FREE next-day UK delivery on every order, so you can try a new strength tomorrow.
Freebase Nicotine vs Nicotine Salts — What's the Difference?
Before choosing a strength, it's worth understanding that there are two very different forms of nicotine used in e-liquid: freebase nicotine and salt nicotine. They behave differently in the body, and the type you choose can change which strength feels right.
Freebase Nicotine
This is the traditional form of nicotine used in most e-liquids. It's free from any binding agents, which makes it slightly harsher at higher concentrations. At 20mg freebase, the throat hit can feel quite intense, which is why many vapers using this type stick to 3mg to 6mg. Freebase nicotine is a better choice for sub-ohm vaping and direct-to-lung devices because the higher vapour volume compensates for the lower nicotine concentration, meaning your body still absorbs a satisfying amount per session.
Nicotine Salts
Nic salts are made by combining freebase nicotine with a mild acid, which lowers the pH and makes nicotine absorption much faster and smoother. This means you can vape 20mg without harsh throat hit, and nicotine reaches your bloodstream at a speed much closer to a traditional cigarette. Nic salts are almost always the recommended choice for smokers switching to vaping, particularly in mouth-to-lung devices such as pod kits and pen-style vapes.
According to Action on Smoking and Health (ASH UK), e-cigarettes are substantially less harmful than smoking and are one of the most effective tools available to help smokers quit. Choosing the right nicotine strength plays a key role in how successful that switch turns out to be.
Nicotine Strength Comparison Table
| Strength | Nicotine Type | Best For | Device Type | Throat Hit |
|---|---|---|---|---|
| 0mg | None | Ex-vapers, cloud chasers | Sub-ohm / any | None |
| 3mg | Freebase | Light ex-smokers, step-down | Sub-ohm kits | Very mild |
| 6mg | Freebase | Light to moderate smokers | Sub-ohm / starter kits | Mild |
| 10mg | Nic salt / freebase | Moderate smokers | Pod kits / pen kits | Medium |
| 20mg ★ | Nic salt | Heavy smokers switching | Pod kits / MTL | Smooth (nic salt) |
The highlighted row shows the most commonly recommended starting point for anyone who was smoking heavily before switching to vaping. 20mg nicotine salts in a pod kit delivers the closest experience to smoking a cigarette without the harmful combustion.
Ready to find the right strength? Our vape starter kits UK come paired with nic salt e-liquids in 10mg and 20mg, making it easy to get everything you need in one go. FREE next-day UK delivery included, and we've got hundreds of five-star reviews from ex-smokers who made the switch with Scent Vape.
How to Choose the Right Nicotine Strength Based on Your Device
Here's something a lot of guides miss: your vaping device changes everything. The same nicotine strength can feel completely different depending on the coil resistance, wattage output, and how much vapour the device produces per puff.
Mouth-to-Lung (MTL) Devices
These include pod kits, pen kits, and prefilled pod systems. They use tight draws that mimic the sensation of pulling on a cigarette. They work best with higher nicotine strengths, typically 10mg to 20mg nic salts. The coil resistance is usually above 1 ohm, which means lower wattage and less vapour per puff, so you need more nicotine per ml to get the same satisfaction.
Sub-Ohm and Direct-to-Lung (DTL) Devices
These produce large clouds and much more vapour per puff. Because you're inhaling significantly more e-liquid per draw, the effective nicotine intake is much higher even at lower concentrations. Using 20mg in a sub ohm kit would deliver an overwhelming amount of nicotine very quickly and cause dizziness or nausea. Stick to 0mg, 3mg or 6mg freebase in these devices.
Nic Salts at 20mg — Pros and Cons
Pros
- Fast nicotine absorption — similar to cigarettes
- Smooth throat hit despite high strength
- Fewer puffs needed to satisfy cravings
- Excellent for heavy smokers making the switch
- Works perfectly in compact pod systems
Cons
- Not suitable for sub-ohm devices
- Can feel too strong for light smokers
- Higher dependency risk if overused
- Less cloud production than lower-strength options
I tried 3mg first and it just wasn't doing anything for me. Switched to 20mg nic salts on a pod kit and haven't touched a cigarette since. The throat hit is smooth and the cravings stopped almost immediately. Scent Vape's delivery was next day as promised too.
Jamie T., verified Scent Vape customerHow to Find Your Perfect Nicotine Strength — Step by Step
Assess Your Old Smoking Habits
Count how many cigarettes you smoked per day. Under 10 per day: start at 6mg to 10mg. 10 to 20 per day: start at 10mg to 20mg. Over 20 per day: start at 20mg nic salts. This is the single most important factor in picking the right level.
Choose the Right Device First
MTL pod kits need 10mg to 20mg nic salts. Sub-ohm devices need 0mg to 6mg freebase. Don't buy your e-liquid until you know what device you're using, because getting this combination wrong is the most common cause of a bad first experience.
Start Slightly Higher Rather Than Lower
It's better to start at a nicotine level that's satisfying and step down over time than to start too low, feel unsatisfied, and go back to cigarettes. You can always reduce strength later once your body has adjusted to getting nicotine through vaping.
Test for Two Weeks Before Changing
Give any new nicotine strength at least two weeks before deciding it's not working. Your body needs time to adjust to the different way nicotine is absorbed through vaping compared to smoking. Nicotine cravings typically reduce significantly within the first two weeks of consistent use.
Step Down When You're Ready
Once you're comfortable at your starting strength and no longer craving cigarettes, consider stepping down. A typical journey looks like: 20mg → 10mg → 6mg → 3mg → 0mg. There's no fixed timeline. Move down only when the current level feels like more than you need.
Our Verdict
For most UK adults switching from cigarettes to vaping, 20mg nicotine salt e-liquid in a pod kit is the best starting point. It closely replicates the speed and satisfaction of smoking, comes with a smooth throat hit, and gives your body the best chance of successfully replacing cigarettes. If you were a light smoker, 10mg is a perfectly good alternative. The key is matching your strength to your smoking history and your device, and then being patient with yourself as your body adjusts.
Frequently Asked Questions About Nicotine Strength for Vape Juice
What nicotine strength should a beginner vaper start with?
Most beginners who were smokers should start with 20mg nicotine salts in a mouth-to-lung pod kit. This provides the fastest nicotine absorption and the smoothest transition from cigarettes to vaping. If you were a very light smoker or never smoked, start with 6mg to 10mg freebase and adjust based on how you feel after a few days.
Is 20mg nicotine too strong for a first-time vaper?
Not if you were a regular smoker. 20mg nic salts are specifically designed to deliver nicotine at a pace that mirrors cigarettes, making them very well-suited for smokers switching to vaping. However, 20mg would be too strong for someone who has never smoked or who only smoked occasionally. In those cases, 3mg to 6mg is a more appropriate starting point.
What is the difference between nic salts and freebase nicotine in terms of strength?
Nic salts and freebase nicotine are different chemically, which affects how quickly nicotine enters your bloodstream and how it feels to inhale. Nic salts are absorbed faster and feel smoother at higher concentrations, making them ideal at 10mg to 20mg. Freebase nicotine becomes quite harsh at higher strengths, so it's generally used at 0mg to 6mg, especially in sub-ohm devices. The same mg value doesn't feel the same across both types.
Can I use 20mg e-liquid in a sub-ohm vape kit?
No, this is not recommended. Sub-ohm devices produce significantly more vapour per puff, which means the amount of nicotine absorbed per draw is much higher than in a pod kit. Using 20mg in a sub-ohm setup would deliver an excessive nicotine dose very quickly, causing dizziness, headaches, or nausea. For sub-ohm vaping, keep nicotine strength at 3mg or below, and always use freebase rather than nic salts.
Where can I buy nicotine salt e-liquids in the UK with fast delivery?
You can browse a wide range of nic salt e-liquids at Scent Vape, including popular brands in 10mg and 20mg strengths. All orders qualify for FREE next-day UK delivery, making it easy to try a new strength or stock up on your regular flavour. Every product is TPD-compliant and sourced from trusted UK suppliers. Orders must be placed by adults aged 18 and over.
How do I know when to step down my nicotine strength?
You're ready to step down when your current nicotine level feels like more than you need, when you're vaping less often to feel satisfied, or when you notice you're occasionally forgetting to vape. A good rule of thumb is to reduce by one level every four to eight weeks if you feel comfortable doing so. There's no obligation to rush, and some vapers are happy to stay at a given level for months before reducing.
Do shortfill e-liquids come in nicotine strengths?
Shortfill e-liquids are sold without nicotine by UK law, as bottles larger than 10ml cannot contain nicotine under TPD regulations. However, you can add nicotine to them using nicotine shots, which are small 10ml bottles of high-strength nicotine. Adding one 18mg nic shot to a 50ml shortfill bottle typically produces a 3mg finished liquid. This makes shortfills very popular with vapers who want larger bottles and prefer to control their nicotine strength precisely.
Find Your Perfect Nicotine Strength at Scent Vape
Whether you're starting at 20mg nic salts or stepping down to 3mg freebase, Scent Vape has every nicotine strength covered with top brands and hundreds of flavours. All products are TPD-compliant. All orders ship FREE to mainland UK, next day. Over 18s only.
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