How to Choose Nicotine Strength in the UK: Complete Guide

To choose a nicotine strength in the UK, match it to how much you smoked. Heavy smokers who smoked 20 or more cigarettes a day should start with 20mg nic salts in a pod kit. Moderate smokers who smoked 10 to 20 a day should start with 10mg to 20mg. Light smokers should start with 10mg. The UK legal maximum is 20mg, and freebase e-liquid is normally 3mg or 6mg for sub-ohm devices.

What nicotine strength should I start with?

Start with 20mg nic salts if you smoked 20 or more cigarettes a day, 10mg to 20mg if you smoked 10 to 20 a day, and 10mg if you smoked fewer than 10 a day. This ladder comes from the site’s own beginner guidance, and it works because nic salts feel smooth even at high strength.

If you smoked under 15 cigarettes a day, start with 10mg. If you smoked more than 15, start with 20mg. Pick one strength and try it for a few days before you change it. Your body needs time to adjust, and changing strength every day makes it hard to tell what is working.

Too low and you will keep craving cigarettes. Too high and you will feel dizzy. You can always adjust, so start in the middle of the range for your smoking level and move up or down from there. See how to choose your first vape kit for the full beginner steps.

What is the strongest nicotine vape in the UK?

The strongest nicotine vape in the UK is 20mg, which is the legal maximum under TPD rules. No e-liquid sold legally in the UK can contain more than 20mg of nicotine per millilitre. The same rules limit pods and tanks to 2ml and bottles to 10ml.

This cap applies to both nic salts and freebase. Nic salts go up to the full 20mg, while freebase tops out around 12mg for comfort because higher freebase feels harsh on the throat. If a shop offers you a liquid above 20mg in the UK, it is not a legal UK product.

The 20mg cap is the reason nic salts became popular in the UK. Salts use benzoic acid to smooth out the harshness, so 20mg salts feel smoother than 6mg freebase. That smoothness lets heavy smokers get enough nicotine from a small pod kit without the harsh throat hit. Read nic salts vs freebase for the full comparison.

Should I choose nic salts or freebase?

Choose nic salts in 10mg or 20mg with a pod kit if you are new to vaping or switching from smoking, and choose freebase in 3mg or 6mg with a sub-ohm device if you are an experienced vaper who enjoys big clouds and lower nicotine. The two types suit different devices, and using the wrong one causes problems.

Nic salts were designed for low-power pod kits and MTL devices under 20W. They absorb faster, so you feel satisfied sooner, and you use less liquid because the higher strength satisfies faster. Freebase is the original form of nicotine. It is alkaline, so higher strengths feel harsh. Most freebase liquids come in 3mg or 6mg, and they work best in larger sub-ohm devices at higher wattages.

Do not use 20mg nic salts in a sub-ohm device. The high power turns the high-strength liquid into far more nicotine per puff than your body expects, and it will make you feel sick. Match the liquid to the device: salts in pod kits, freebase in sub-ohm tanks.

What is the best nicotine strength for beginners?

The best nicotine strength for beginners is 10mg or 20mg nic salts in a refillable pod kit. A pod kit is draw activated, needs no settings, and uses 2ml TPD-compliant pods, so it is the simplest way to start.

All the beginner pod kits on this site work with 10mg to 20mg nic salts. They have 1000mAh or larger batteries, which gets most beginners through a full day. You fill the pod, click it in, and inhale. There is nothing to configure. See the best pod kits for beginners UK 2026 for tested recommendations.

Start with 10mg if you smoked under 15 cigarettes a day, and 20mg if you smoked more. Buy 10ml bottles only until you find the strength and flavour you like. A single flavour is best at first, because it makes it easier to tell whether the strength is right.

How do I know if my nicotine strength is too low?

Your nicotine strength is too low if you keep craving cigarettes, you vape constantly without feeling satisfied, or you finish a pod far faster than expected. These are the signs that your body is not getting enough nicotine from each puff.

If the strength is too low, you will find yourself chain vaping, taking puff after puff to chase the feeling. That uses up liquid quickly and wears out coils faster. It also leaves you frustrated. Learn how long a vape coil lasts so you know when a worn coil is the real problem.

The fix is simple: move up one step. If you are on 10mg, try 20mg. If you are on 3mg freebase, try 6mg. Give the new strength a few days before you judge it. Do not jump straight to the maximum if a single step up solves the cravings.

How do I know if my nicotine strength is too high?

Your nicotine strength is too high if you feel dizzy, light-headed, nauseous, or you get a headache after vaping. These are the signs that you are taking in more nicotine than your body is used to.

If you feel dizzy, stop vaping for a while and drink some water. Do not keep vaping through the dizziness. When you feel normal again, move down one step. If you are on 20mg, try 10mg. If you are on 6mg freebase, try 3mg.

Too high is easier to fix than too low, because you can simply vape less often or move down a strength. The goal is the lowest strength that keeps cravings away, not the highest strength you can tolerate.

Can I use 20mg nic salts in a sub-ohm device?

No, do not use 20mg nic salts in a sub-ohm device. A sub-ohm device runs at higher wattage and produces far more vapour per puff than a pod kit. That means each puff delivers far more nicotine, and 20mg salts in a sub-ohm tank will make you feel sick.

Nic salts belong in pod kits and MTL devices under 20W. Freebase suits sub-ohm tanks, and even then the strength should be 3mg or 6mg. The device and the liquid must match. A high-strength liquid needs a low-power device, and a high-power device needs a low-strength liquid.

If you already have a sub-ohm device and want to use nic salts, use a low strength and a higher-resistance coil, or switch to a pod kit for your salts. Do not put 20mg salts in a sub-ohm tank. Read vape battery safety UK before you use a high-power device.

How do I lower my nicotine strength?

Lower your nicotine strength one step at a time, and stay at each step for at least a week before you drop again. A gradual step down works better than a sudden jump, because your body adjusts to the lower amount.

If you are on 20mg, move to 10mg and stay there for a week or two. Then move to 6mg freebase or 10mg salts, depending on your device. If you are on 10mg, move to 6mg, then to 3mg. Each step should feel comfortable before you take the next one.

Some vapers mix two strengths to make an in-between level, but it is simpler to buy the next strength down. If cravings come back at the lower strength, go back up one step and try again in a few weeks. There is no rush, and the lowest strength that keeps you satisfied is the right one. Learn how to store vape juice UK so your liquid stays fresh while you step down.

Is 0mg nicotine vape legal in the UK?

Yes, 0mg nicotine vapes are legal in the UK, but the 18+ age rule still applies even to zero-nicotine vapes. You must be 18 or over to buy any vape device or e-liquid in the UK, including 0mg liquid.

A 0mg vape contains no nicotine at all. It is the right choice if you enjoy vaping but do not want nicotine, or if you have already stepped down to zero. Do not start with 0mg if you are quitting smoking, because it will not satisfy cravings.

The same TPD rules apply to 0mg liquid: 2ml maximum pods and tanks, and 10ml maximum bottles. The only difference is the nicotine content. See the UK vape tax 2026 guide for the rules that affect prices and products.

Frequently asked questions

What nicotine strength should I start with?
Heavy smokers start with 20mg nic salts, moderate smokers with 10mg to 20mg, and light smokers with 10mg. Under 15 a day means 10mg, over 15 means 20mg.

Is 20mg nicotine too strong?
20mg is the UK legal maximum, and it suits heavy smokers. If you feel dizzy or nauseous, it is too strong for you, so move down to 10mg.

What is the strongest nicotine vape in the UK?
20mg is the strongest legal nicotine strength in the UK under TPD rules. No legal UK e-liquid contains more than 20mg per millilitre.

Can I use 20mg nic salts in a sub-ohm device?
No. A sub-ohm device produces far more vapour per puff, so 20mg salts in it will make you feel sick. Use salts in pod kits under 20W only.

How do I know if my nicotine strength is too low?
You keep craving cigarettes, you vape constantly without feeling satisfied, or you finish pods far faster than expected. Move up one step.

What nicotine strength for ex-smokers?
Ex-smokers should use 10mg or 20mg nic salts in a pod kit, depending on how much they smoked. Heavy smokers need 20mg, light smokers need 10mg.

Is 0mg nicotine vape legal in the UK?
Yes, but you must still be 18 or over to buy it. The 18+ rule applies to all vapes, including zero-nicotine ones.

How do I lower my nicotine strength?
Drop one step at a time and stay at each step for at least a week. From 20mg go to 10mg, then to 6mg, then to 3mg. If cravings return, go back up one step.

Keep your kit in good shape while you find the right strength. Read the vape maintenance guide to make your kit last longer, and browse the best vape flavours UK 2026 once your strength is settled. Browse all reviews at Vape Reviews UK.