How to Choose a Nicotine Strength in the UK: A Clear mg/ml Guide
TL;DR: The right nicotine strength depends on your previous nicotine use, the device you use and how comfortable the liquid feels. Read the label in mg/ml, treat any suggested range as a starting point and adjust carefully. If you feel unwell, stop using it and seek appropriate advice.
By VapeKitUK Editorial Team
What does mg/ml mean?
mg/ml means milligrams of nicotine per millilitre of e-liquid. A 10mg/ml liquid contains 10mg of nicotine in each millilitre. The number is a concentration, not a promise about how much nicotine your body will absorb from every puff.
| Label | What it tells you |
|---|---|
| 0mg/ml | No nicotine is added. |
| 10mg/ml | 10mg of nicotine per millilitre. |
| 20mg/ml | 20mg of nicotine per millilitre. |
The total amount in a bottle also depends on its volume. A 10ml bottle labelled 10mg/ml contains 100mg of nicotine in the liquid overall, before taking account of how much is actually used.
How should an adult choose a starting strength?
There is no reliable one-number conversion from cigarettes to e-liquid. As a practical starting point, think about how often you smoked, how soon after waking you wanted a cigarette and whether you are using a compact pod or a more powerful device.
- Adults who smoked occasionally may prefer to begin with a lower strength.
- Adults who smoked regularly may find a medium or higher strength more comfortable.
- A small, low-powered pod is commonly paired with nicotine salts, while a larger, higher-powered device normally uses a lower-strength liquid.
These are starting points, not medical instructions. The NHS advises adults switching from smoking to choose a nicotine level that helps manage cravings and to ask a specialist vape shop or Stop Smoking Service for support.
Nicotine salts and freebase nicotine
Nicotine salts
Nicotine salts are formulated for a smoother inhale at higher concentrations. They are often used in compact pod devices and are available in strengths such as 10mg/ml or 20mg/ml. A smoother sensation does not mean the liquid contains less nicotine.
Freebase nicotine
Freebase nicotine is the traditional form used in many e-liquids. It can provide a more noticeable throat sensation and is commonly found in lower strengths, although the label is what matters.
Adults can compare the nicotine salts collection and e-liquid collection, but always check that the liquid suits the device.
How can you tell if the strength is too low?
Frequent urges to smoke, feeling that the vape is not satisfying or repeatedly reaching for it without relief may mean the strength or device is not working well for you. It can also mean the pod is empty, the coil is worn or the device is not being used correctly, so check those points before changing strength.
How can you tell if the strength is too high?
Stop using the liquid if you feel dizzy, nauseous, headachy, shaky or generally unwell. Do not try to push through those symptoms. Move to a lower strength only when you feel well, and speak to a pharmacist or other qualified professional if symptoms continue.
What are the UK nicotine limits?
UK consumer nicotine products are subject to limits on strength, bottle size and tank or cartridge capacity. The current maximum consumer e-liquid strength is 20mg/ml. Check the latest GOV.UK regulations guidance because rules and official wording can change.
Nicotine products are for adults aged 18 and over. Keep e-liquid away from children and pets and follow the safety information on the packaging.
Frequently asked questions
Is 20mg/ml twice as strong as 10mg/ml?
Yes. It contains twice the nicotine concentration per millilitre.
Is 10mg nicotine salt the same as 10mg freebase?
The concentration is expressed in the same unit, but the two formulations can feel different and may suit different devices. Check the product label and device guidance.
Can I use nicotine salts in any vape?
No. Nicotine salts are generally intended for compatible lower-powered devices. Check the manufacturer’s instructions before using them.
Should I reduce nicotine strength straight away?
Not necessarily. Choose a comfortable starting point and only reduce when you feel ready. Reducing too quickly can make cravings harder to manage.
What if I am unsure which strength to choose?
Speak to a reputable vape retailer, pharmacist or local Stop Smoking Service. Take the device and liquid details with you if possible.
Sources and further reading
Reviewed by the VapeKitUK Editorial Team. This is general information for adults and is not medical advice.
