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Monday, 19 October 2026Independent vape reviews, guides & culture

Vape 101Updated

Nicotine Strength Explained: Milligrams, Percentages and Salts

What mg/ml actually means, how it relates to percentages, and why salts behave differently.

Guides DeskUpdated 20 Jan 20261 min read
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E-liquid bottles and devices on a table
Illustrative photo: Sierra Alpha Juliet / Unsplash

Nicotine strength on a bottle is usually given in milligrams per millilitre (mg/ml). Sometimes it’s shown as a percentage instead.

Converting the numbers

The maths is simple: 1% equals 10 mg/ml. So 2% is 20 mg/ml and 0.3% is 3 mg/ml.

Freebase vs nicotine salts

Freebase nicotine is the traditional form. Nicotine salts are formulated to feel smoother at higher strengths, which is why they’re common in pod systems. Neither is “better” — they suit different devices.

Device matters

Higher strengths are typically used in low-power MTL devices; lower strengths in higher-power DTL setups. Mixing those up can make for an unpleasant experience.

Important

Nicotine is addictive. This article explains labelling only — it isn’t health advice. Follow the laws where you live, and if you don’t vape, don’t start.

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