What Nicotine Strength E-Liquid Should You Choose?
Choosing the right nicotine strength is the single most important decision when you start vaping. This guide matches your smoking history to the correct mg level and explains the difference between freebase and nic salt.
Quick answer: Match your strength to how many cigarettes you smoked per day. Heavy smokers (15 or more per day) should start at 20mg nic salt. Moderate smokers (10 to 15 per day) should start at 20mg and review after two weeks. Light smokers (under 10 per day) should start at 10mg. Ex-disposable users should start at 20mg nic salt to replicate the same experience. If you used a pod kit before, stay at the same strength and adjust once settled.
Why Nicotine Strength Matters So Much
Get the strength right and switching from cigarettes feels straightforward. Get it wrong and you either feel unsatisfied and reach for a cigarette or feel dizzy and put the vape down. Most people who go back to cigarettes after trying to vape do so because they started on a strength that was too low. It is always easier to drop down from a higher strength than to keep chasing satisfaction at a level that is not working.
Nicotine strength is measured in milligrams per millilitre (mg/ml), usually shown as just mg on the bottle. This tells you how much nicotine is in each millilitre of e-liquid. In the UK, the legal maximum under TRPR is 20mg. You may also see strength shown as a percentage: 20mg equals 2%, 10mg equals 1%, 6mg equals 0.6% and so on.
Match Your Smoking History to the Right Strength
| Your Situation | Recommended Strength | Nicotine Type | Notes |
|---|---|---|---|
| Heavy smoker (20+ per day) | 20mg | Nic salt | Start here and step down only once cravings are fully managed |
| Moderate smoker (10–20 per day) | 20mg to start | Nic salt | Review after two weeks; step to 10mg when comfortable |
| Light smoker (under 10 per day) | 10mg | Nic salt | 20mg may cause dizziness at low tolerance; start lower |
| Ex-disposable user | 20mg | Nic salt | Disposables used 20mg nic salt; match this for a familiar experience |
| Sub-ohm or DTL vaper | 3mg or 6mg | Freebase | High vapour production means nicotine per puff is much higher |
| Established vaper stepping down | 10mg or 5mg | Either | Drop one level at a time and allow two to four weeks to adjust |
| Non-smoker (flavour only) | 0mg | No nicotine | Nicotine-free options available across the Celtic Vapours range |
If you are unsure which category applies to you, start slightly higher than you think you need. You can always step down once your cravings are consistently managed. Starting too low is the most common reason new vapers return to cigarettes within the first two weeks.
Freebase Nicotine or Nic Salt: Which Should You Choose?
The type of nicotine matters as much as the mg level. The same strength in freebase and nic salt formats feels noticeably different when vaped. Understanding the difference helps you choose the right product for your needs.
Freebase Nicotine
The traditional form of nicotine used in most e-liquids. Produces a stronger throat hit that becomes more noticeable as strength increases. Available in 0mg, 3mg, 6mg, 12mg and 18mg. Works well in sub-ohm and DTL devices at lower concentrations. Can feel harsh at 12mg or above in high-powered devices. Best suited to vapers who enjoy the physical sensation of a throat hit or who are using sub-ohm kits at low strength.
Nicotine Salt
Nicotine salt uses benzoic acid to lower the pH of nicotine, making it considerably smoother even at 20mg. It absorbs into the bloodstream faster than freebase, which means it satisfies cravings more quickly and more closely replicates the experience of smoking a cigarette. Available in 5mg, 10mg and 20mg. Best suited to ex-smokers, ex-disposable users and anyone using an MTL pod kit. Celtic Vapours recommends nic salt for anyone switching from cigarettes.
When to Use Freebase
Choose freebase at 3mg or 6mg if you vape on a sub-ohm device and want a low background level of nicotine. Choose freebase at 12mg or 18mg if you specifically want a pronounced throat hit and are using a low-powered MTL kit. Freebase at 18mg or above can feel harsh in powerful devices and is not recommended for high-wattage setups.
When to Use Nic Salt
Choose nic salt at 20mg if you are switching from cigarettes, were a regular disposable vape user or need fast, effective craving relief. Choose 10mg if you are a light smoker or want to step down from 20mg. Nic salt is not recommended for sub-ohm or DTL devices as the high nicotine delivery per puff can be overwhelming in high-vapour setups.
How to Step Down Your Nicotine Strength Over Time
One of the advantages of vaping over other nicotine replacement methods is that you can reduce your nicotine intake gradually at your own pace. There is no requirement to step down at all. If vaping at 20mg keeps you away from cigarettes, there is no pressure to reduce. However, if you want to lower your nicotine intake over time, the following approach works well for most people.
Establish Yourself at Your Starting Strength
Stay at your starting strength until cigarette cravings are fully under control and you are vaping comfortably without missing cigarettes. This typically takes two to four weeks. Do not attempt to reduce strength until you feel completely stable.
Drop by One Level at a Time
Move from 20mg to 10mg. From 10mg move to 6mg. From 6mg move to 3mg. Do not jump multiple levels in one go. Each reduction takes two to four weeks to adjust to fully. If cravings return or feel unmanageable, go back to the previous level and try again later.
Switch Nicotine Type If Needed
When stepping down from 20mg nic salt to a lower level, you can switch to freebase at 6mg or 3mg for a different style of delivery. Some vapers find freebase at low strength a useful final step before reaching 0mg, as the slight throat hit provides a similar physical sensation to a stronger nic salt.
Reach 0mg If That Is Your Goal
Some vapers successfully reach 0mg and continue vaping for the flavour and habit alone. Others settle at a low maintenance level such as 3mg and stay there indefinitely. Both outcomes are valid. The goal is to stay away from cigarettes and manage your health in a way that works for you.
Shop Celtic Vapours E-Liquid in Every Nicotine Strength
Made in Wales. TRPR compliant. Available in freebase and nic salt formats across a wide range of flavours.
Frequently Asked Questions
Not necessarily. Nic salt at 20mg is smooth enough that many moderate smokers tolerate it well in a pod kit. If you try 20mg and feel dizzy or nauseous after a few puffs, step down to 10mg. If you try 10mg and still have strong cigarette cravings, go back to 20mg. Allow three to four days at each level before deciding if it is working.
Yes. If 10mg feels too low but 20mg feels too strong, you can fill your pod halfway with each to create approximately 15mg. This is a practical way to find an intermediate level between two available strengths. Both bottles must use the same nicotine type (both freebase or both nic salt) and a similar PG:VG ratio for the best result.
They mean exactly the same thing. 20mg/ml means there are 20 milligrams of nicotine in every millilitre of liquid. 2% means nicotine makes up 2% of the total liquid by volume. The two measurements are interchangeable. Multiply a percentage by 10 to convert to mg: 2% equals 20mg, 1% equals 10mg, 0.6% equals 6mg.
At similar mg levels, freebase and nic salt can taste slightly different because of the acids used in nic salt formulations. Higher nicotine concentrations can also affect perceived flavour slightly. In practice, most vapers find that well-formulated e-liquids taste consistent across nicotine strengths once they are used to the format.
Nicotine craving is only one part of the habit. Some people also miss the ritual of smoking, the social aspect or the specific physical sensation of a cigarette. Ensure your device is working correctly and that you are using it frequently enough in the first few days. If cravings persist beyond two weeks at 20mg nic salt in an MTL pod kit, speak to your GP about NHS Stop Smoking services that can provide additional support.
Explore the Celtic Vapours 10ml E-Liquid Guide
Our hub page covers everything from understanding what mg means on a bottle to storing your e-liquid and finding the best flavours.