What Nicotine Strength Should I Vape? A UK Beginner's Guide

Picking the wrong nicotine strength is one of the most common mistakes new vapers make, and it's often the reason someone tries vaping, finds it unsatisfying or unpleasant, and goes back to smoking within days. Get the strength right from the start and the whole experience feels far more natural. This guide walks through exactly how UK nicotine strengths work, how to match strength to your smoking habit, and when it makes sense to step down over time.

Table of Contents

• Quick Answer Table
• How UK Nicotine Strengths Work
• Matching Strength to Your Smoking Habit
• Nic Salts vs Freebase Strength Differences
• Signs You've Got the Wrong Strength
• When and How to Step Down
• What About Non-Smokers Trying Vaping?
• FAQ

Quick Answer Table

These figures are a starting guide rather than a strict rule — individual tolerance varies, and it's always fine to adjust up or down based on how a strength actually feels once you try it.

How UK Nicotine Strengths Work

The legal maximum

Under current UK regulation, e-liquid nicotine strength is capped at 20mg/ml, and tank/pod capacity is limited to 2ml for refillable devices, with bottled e-liquid sold in 10ml bottles. This is a long-standing rule under the Tobacco and Related Products Regulations, and it applies across the market regardless of which brand or retailer you buy from.

How strength is measured

Nicotine strength is expressed in milligrams per millilitre (mg/ml, often shortened to just "mg"), representing how much nicotine is present in each millilitre of e-liquid. A 20mg bottle contains more nicotine per millilitre than a 10mg bottle of the same size, though how much of that nicotine you actually absorb depends on additional factors like nic salt vs freebase formulation and your device's wattage.

Common UK strength options

Freebase e-liquid is commonly available at 0mg, 3mg, 6mg, 12mg and 18mg. Nic salts are most commonly sold at 10mg and 20mg, occasionally with a 5mg option available on some brands for those wanting a lighter nic salt experience.

Matching Strength to Your Smoking Habit

Light smoker (under 10 cigarettes/day)

If you smoke fewer than 10 cigarettes a day, starting somewhere in the 6-10mg range is generally a sensible starting point, whether using nic salts or freebase. This range tends to provide enough satisfaction without feeling overwhelming for lighter smokers.

Moderate smoker (10-20 cigarettes/day)

Smokers in this range often do best starting at 10mg nic salt, with some finding 20mg more appropriate depending on how heavily they smoked and how quickly they went through each cigarette. This is genuinely a middle ground where personal preference plays a bigger role than with lighter or heavier smoking habits.

Heavy smoker (20+ cigarettes/day)

Heavier smokers generally do best starting at 20mg nic salt, the legal maximum strength currently available in the UK. Starting lower than this as a heavy smoker is one of the most common reasons people find vaping unsatisfying and return to cigarettes, since the nicotine delivery simply doesn't match what they're used to.

Roll-up cigarette smokers

Roll-up smoking habits vary hugely in nicotine intake depending on how tightly and how often someone rolls, so this group benefits particularly from starting at a moderate-to-high strength (10-20mg) and adjusting based on how it feels, rather than relying on a precise cigarette-count comparison that doesn't translate cleanly from roll-ups.

Browse strength options across our nic salts collection and 10ml freebase e-liquids to see what's currently available at each strength.

Nic Salts vs Freebase Strength Differences

It's worth understanding that nic salt and freebase strengths aren't directly comparable on a like-for-like basis, even at the same mg number. A 10mg nic salt generally feels smoother and delivers nicotine faster than a 10mg freebase liquid, which is part of why nic salts are commonly used at higher strengths (10-20mg) while freebase is more commonly used at lower strengths (3-18mg) in devices built for bigger vapour production. For a full breakdown of how the two formats differ beyond just strength, see our guide on nic salt vs freebase e-liquid.

Signs You've Got the Wrong Strength

Signs your strength is too low

• You find yourself vaping constantly throughout the day without feeling satisfied
• You still crave cigarettes shortly after vaping
• The device feels "empty" or flavourless in terms of the actual nicotine hit, even if the flavour itself tastes fine

Signs your strength is too high

• You feel light-headed, dizzy, or slightly nauseous after vaping
• You get a harsh, unpleasant throat hit even on a nic salt, which is designed to feel smooth
• You find yourself coughing more than expected, particularly as a newer vaper

If either of these sounds familiar, it's a strong signal to adjust your strength up or down rather than assuming vaping simply "isn't for you."

When and How to Step Down

Why some vapers choose to step down

Many vapers gradually reduce their nicotine strength over weeks or months once they're comfortable with vaping as a habit, either as a step toward eventually reducing nicotine intake altogether, or simply because their tolerance changes over time.

A sensible step-down approach

Rather than jumping straight from 20mg to a much lower strength, a gradual approach — for example moving from 20mg to 10mg, then later to 6mg, rather than skipping strengths — tends to feel more comfortable and sustainable than a sudden, large drop.

There's no required timeline

Some vapers step down within a few months, others stay at a comfortable strength indefinitely, and both are entirely reasonable approaches. Stepping down isn't compulsory, and there's no fixed schedule you need to follow — it's a personal decision based on your own goals.

What About Non-Smokers Trying Vaping?

If you've never smoked and are trying vaping out of curiosity, it's generally advisable to start at the lowest available strength, or even 0mg, since your tolerance to nicotine won't be established the way it would be for a smoker. Nicotine can feel genuinely unpleasant (dizziness, nausea) for someone without an existing tolerance, so there's no benefit to starting high.

FAQ

Is 20mg nicotine strong?

Yes, 20mg is the current legal maximum nicotine strength for e-liquid in the UK, and it's generally best suited to moderate-to-heavy smokers rather than beginners or occasional smokers.

What strength is closest to a cigarette?

There's no exact universal equivalent, since it depends on how much and how often someone smoked, but 20mg nic salt is commonly considered the closest match for a typical pack-a-day smoker's nicotine intake.

Can I mix nicotine strengths?

Yes, some vapers do combine different strength bottles to land on a strength in between standard options, though it's worth doing the maths carefully so you know roughly what combined strength you end up with.

Is it bad to vape at too high a strength?

It's not inherently dangerous, but vaping at a strength higher than your tolerance can cause unpleasant side effects like light-headedness, nausea, or a harsh throat hit, which is why matching strength to your habit matters.

How long should I stay on my starting strength before changing it?

There's no fixed rule, but giving yourself at least a week or two on a new strength is generally sensible before deciding whether to adjust, since it takes a little time to judge whether it genuinely feels right.

Do I need a stronger nic salt if I switch from a disposable vape?

Most disposables in the UK were sold at or near the 20mg legal maximum, so matching that strength with a 20mg nic salt when switching to a refillable or prefilled system is generally a sensible starting point.

Browse nic salts and freebase e-liquids across every strength at The No1 Plug, with free UK delivery on orders over £40.