Nicotine Strengths Explained: How to Pick the Right mg

Few decisions shape the vaping experience more than nicotine strength, and yet the numbers on a bottle or a tin of pouches rarely explain themselves. A figure that feels right in one device can feel entirely wrong in another, and the format you choose changes how that figure behaves. This guide sets out what those numbers mean, how e-liquids and pouches differ, and how to match a strength to your own habits with a degree of confidence rather than guesswork.

How nicotine strength is measured

The unit you see depends on the product. For e-liquids sold in the UK, strength is given in milligrams of nicotine per millilitre of liquid, written as mg/ml and sometimes expressed as a percentage, where 20mg/ml is equivalent to 2 per cent. The figure tells you the concentration of the liquid, not the total amount you will take in, which depends on how much you vape and how you vape it.

Nicotine pouches use a different measure entirely. Their strength is given in milligrams per pouch, written as mg/pouch, describing how much nicotine each individual pouch contains. Because a pouch is a fixed, single-use item, that number is a more direct guide to the dose than an e-liquid figure tends to be. The two units are not interchangeable, so a 10mg/ml e-liquid and a 10mg pouch are not comparable in any meaningful way.

This is the single most common source of confusion when people move between formats. With an e-liquid, the headline number describes the liquid itself, and the amount you actually take in scales with how long and how often you vape across a session. With a pouch, the number is tied to one discrete item with a defined lifespan in the mouth. Keeping that distinction in mind makes the strength bands on each product far easier to read, because you stop trying to translate one scale onto the other and instead read each format on its own terms.

E-liquid strengths explained

UK regulations cap nicotine-containing e-liquids at 20mg/ml, sold in bottles of up to 10ml, and any tank or pod is limited to 2ml in capacity. Within that ceiling, the strengths you will encounter most often are 3mg, 6mg, 10mg, 12mg and 20mg per millilitre, with some ranges offering a few points in between.

As a broad orientation, the lower figures of 3mg and 6mg tend to suit larger direct-to-lung kits that produce more vapour, while the higher figures around 10mg to 20mg are generally paired with smaller mouth-to-lung pod kits. The reason has less to do with the number itself and more to do with how much vapour a device generates and how that vapour is inhaled, which we turn to below. Our e-liquids range carries the full spread of strengths so you are not locked into one band by availability.

Freebase vs nic salts

Most e-liquids come in one of two formulations, and the distinction matters when choosing a strength. Freebase nicotine is the traditional form. At higher concentrations it can feel harsh on the throat, which is part of why freebase liquids are typically sold at lower strengths such as 3mg and 6mg and paired with bigger sub-ohm, direct-to-lung kits that move a lot of vapour.

Nicotine salts, often labelled nic salts, are formulated to feel smoother at higher concentrations. That smoothness is why salts are commonly offered at 10mg and 20mg and matched with compact mouth-to-lung pod systems. The same 20mg figure delivered as a salt generally feels far less abrasive than it would as freebase, which is why small pod kits lean almost exclusively on salt-based liquids. If you are setting up a refillable system for the first time, our guide to the best refillable vape kits for beginners walks through how device choice and liquid type fit together.

Pouch strengths explained

Nicotine pouches sit under the upper lip and are measured per pouch rather than per millilitre, which makes their strength bands easier to read at a glance. As a rough guide, light pouches sit around 4mg to 6mg, regular pouches around 6mg to 10mg, strong pouches around 10mg to 15mg, and extra-strong pouches at 16mg and above. Some brands push well beyond that upper figure, so it is always worth reading the tin rather than assuming a label like "strong" means the same thing across the board.

It is worth noting that not all of the nicotine in a pouch is absorbed, and how much you take in depends on how long the pouch is kept in place and individual factors. The mg figure is therefore a ceiling rather than a precise dose. Our nicotine pouches selection spans the full range of bands, and if pouches are new to you, the how to use nicotine pouches guide covers placement and timing.

How to choose your strength

The most reliable starting point is your current habit rather than an abstract idea of what you think you should use. If you already vape, the simplest approach is to match the strength and format you are accustomed to and adjust from there. Someone moving from a small pod kit at 20mg salts will usually want to stay in that region if they pick up another mouth-to-lung device, while someone who favours large clouds from a sub-ohm kit will find 3mg or 6mg freebase more comfortable.

Inhalation style is the variable people most often overlook. A mouth-to-lung draw, where vapour is held briefly in the mouth before inhaling, delivers nicotine more gradually, so higher strengths feel manageable. A direct-to-lung draw pulls vapour straight into the lungs in far greater volume, so a high strength quickly becomes overwhelming, which is exactly why big-vapour kits are paired with low numbers. The device and the strength are really one decision, not two.

For pouches, choose by how the strength feels in place rather than by the label alone. If you are unsure, starting in a lighter or regular band and moving up only if needed is more comfortable than starting high and finding it too intense. Bear in mind that a pouch left in place for longer will generally deliver more of its nicotine than one removed quickly, so the experience is shaped by your routine as much as by the figure on the tin.

Across both formats, there is no obligation to settle on a single figure. Some people keep a stronger option for certain points in the day and a lighter one the rest of the time, while others blend formats entirely, using pouches at some moments and an e-liquid kit at others. Many also step their strength down gradually over time, and you can move between bands freely as your preferences change. Nothing about the first choice is binding. The full store carries both e-liquids and pouches across every strength, so adjusting up or down is straightforward whenever you decide to.

Signs a strength is too high

A strength that is too high for you tends to announce itself fairly quickly. The most common signs are nausea, dizziness or light-headedness, a headache, and hiccups, sometimes alongside a racing feeling or general discomfort. These are your cue to stop, take a break and step down to a lower figure.

Stepping down is simple in practice. With e-liquids, move to the next strength below, switching from 20mg to 10mg salts for instance, or from 6mg to 3mg freebase. With pouches, drop a band, from strong to regular or from regular to light. You can also reduce gradually rather than all at once, easing the figure down over a period that suits you. There is no rush and no fixed schedule. The aim is a strength that feels comfortable and consistent rather than one that pushes you.

Questions, answered

What is the strongest e-liquid I can buy in the UK? The legal maximum for nicotine-containing e-liquid is 20mg/ml, equivalent to 2 per cent. Any compliant bottle sold here will not exceed that figure, and bottles are limited to 10ml with tanks and pods capped at 2ml.

Why does the same strength feel different in two devices? Because the device determines how much vapour you take in and how it is inhaled. A small mouth-to-lung pod delivers nicotine gently, so 20mg feels measured, whereas a high-output direct-to-lung kit moves far more vapour, making the same figure feel overpowering.

Can I compare e-liquid mg/ml directly with pouch mg? No. The two use different units and different routes of absorption. An e-liquid figure describes concentration per millilitre of liquid, while a pouch figure describes the total nicotine in a single pouch, so the numbers are not equivalent.

Should I start high or low? If you are unsure, the lower end of a band is the more comfortable place to begin, since moving up is easier than recovering from a strength that feels too intense. Matching your existing habit is the most reliable guide if you already use nicotine.

Are higher-strength pouches always 16mg? No. Extra-strong is a loose label that generally starts around 16mg, but some brands go considerably higher. Strength names are not standardised across the market, so the mg figure on the tin is the only reliable reference.

Can I lower my strength over time? Yes. Many people step down gradually, moving to the next band below at a pace that suits them, and you can blend formats while you do so. There is no fixed schedule to follow.

Vape EU sells to over-18s only. Nicotine is an addictive substance. This article is general information, not health or medical advice.

Frequently asked questions

What is the strongest e-liquid you can legally buy in the UK?

The legal maximum for nicotine-containing e-liquid in the UK is 20mg/ml, equivalent to 2 per cent, under the Tobacco and Related Products Regulations 2016. Compliant bottles are capped at 10ml, and any tank or pod is limited to a 2ml capacity. Any product exceeding those limits is not legally sold for retail in the UK market.

What does mg/ml mean on a bottle of vape juice?

mg/ml stands for milligrams of nicotine per millilitre of liquid, describing the concentration of the e-liquid rather than the total dose you inhale. A 10mg/ml bottle therefore contains 10 milligrams of nicotine in every millilitre, and 20mg/ml equates to 2 per cent strength. The amount you actually take in still depends on how long and how often you vape during a session.

Can I compare e-liquid mg/ml directly with nicotine pouch mg?

No, the two figures use different units and different routes of absorption, so they are not interchangeable. E-liquid strength describes concentration per millilitre of liquid, while a pouch figure describes the total nicotine contained in a single, fixed-use pouch. A 10mg/ml e-liquid and a 10mg pouch therefore cannot be compared in any meaningful way.

Why does the same nicotine strength feel different in two vape devices?

The device determines how much vapour you inhale per puff and how that vapour is drawn in, which changes how the nicotine lands. A small mouth-to-lung pod kit delivers 20mg nic salts in a measured way, whereas a high-output sub-ohm direct-to-lung kit moves far more vapour, making the same figure feel overpowering. This is why low strengths of 3mg and 6mg freebase are paired with cloud-producing kits, and higher salt strengths with compact pods.

What is the difference between freebase nicotine and nic salts?

Freebase is the traditional form of nicotine and can feel harsh at higher concentrations, which is why it is typically sold at 3mg and 6mg for sub-ohm direct-to-lung devices. Nicotine salts are formulated to feel smoother at higher strengths, so they are commonly offered at 10mg and 20mg and matched with mouth-to-lung pod systems. The same 20mg figure as a salt generally feels far less abrasive on the throat than as freebase.

How strong are extra-strong nicotine pouches?

Extra-strong pouches generally start around 16mg per pouch, but the label is not standardised and some brands push considerably higher. Light pouches typically sit around 4mg to 6mg, regular around 6mg to 10mg, and strong around 10mg to 15mg. Because strength names vary across the market, the mg figure printed on the tin is the only reliable reference.

What are the signs that my nicotine strength is too high?

A strength that is too high tends to announce itself through nausea, dizziness or light-headedness, headaches, hiccups, and sometimes a racing feeling or general discomfort. These are your cue to stop, take a break and step down a band, for instance from 20mg to 10mg salts or from strong pouches to regular. There is no fixed schedule for reducing, and easing the figure down gradually is perfectly acceptable.