Every number on the box, decoded
Vape packaging squeezes a surprising amount of regulation into a small space: nicotine in two different units, capacities in millilitres, puff counts, warning labels and batch codes. Most of it is TPD-mandated — the packaging rules behind every panel explain why — and knowing how to read it takes two minutes, and immediately separates compliant EU stock from grey-market imports. This guide walks through each number you will see on a disposable vape box or a bottle of e-liquid.
Nicotine: mg/ml and percent are the same thing
The single most common confusion. EU packaging states nicotine as mg/ml (milligrams per millilitre); US packaging uses percent. The conversion is simple - divide by 10, and our guide to converting nicotine percentages to mg works through the same maths device by device:
| mg/ml | Percent | Legal in the EU? | Typical label |
|---|---|---|---|
| 0 | 0.0% | Yes | "Nicotine-free" |
| 3 | 0.3% | Yes | Low |
| 6 | 0.6% | Yes | Low-medium |
| 10 | 1.0% | Yes | Medium |
| 20 | 2.0% | Yes - the EU maximum | "2% nicotine" |
| 50 | 5.0% | No - US-only | "5% nicotine" (imports) |
A box saying "5%" is a sure sign of non-EU stock: the TPD caps nicotine at 20 mg/ml (2.0%), and 5% devices seized at customs are destroyed. Everything about what the strength means for your body is in our nicotine strength guide; the chemistry behind the two nicotine types is in freebase vs salts.
Millilitres and puff counts
TPD also limits liquid: pods and tanks to 2 ml, bottles to 10 ml where they contain nicotine. That is why a disposable claiming "16,000 puffs" holds a 20-30 ml reservoir - the puff number describes total liquid capacity converted at roughly 1.5-2 ml per 1,000 puffs, not the tank size.
Treat puff counts as a capacity comparison, not a promise. Real-world results land at 70-85% of the advertised figure because puff length varies from person to person. The full math is in our puff-count guide, and the legal framework behind the 2 ml cap is in the TPD rules explainer.
Warning labels and health marks
Every nicotine-containing product sold legally in the EU must carry a health warning covering at least 30% of the visible surfaces: "This product contains nicotine which is a highly addictive substance." Anything with nicotine that lacks the warning is not EU-compliant stock - one of the nine checks in our counterfeit-spotting guide. Child-resistant packaging and a tamper-evident seal are also TPD requirements, not extras.
Batch codes, dates and the small print
Legitimate boxes carry a batch code and often a best-before date. Two things to do with them:
- Check consistency. The batch code on the box should match the code printed on the device itself. Mismatches are a counterfeit red flag; many brands offer online authenticity checks by code.
- Respect the date. E-liquid oxidises over time - typically fine for 1-2 years if stored cool and dark, but noticeably duller after. A device that has sat in a hot warehouse for a year tastes stale even when genuine; our ingredients guide explains what degrades, and the storage guide how to slow it down.
Nicotine-free devices legally need no warning label, but they still state "0 mg" or "0%" - the zero-nicotine guide covers that segment and why flavour-only vaping still needs the same storage discipline.
A 30-second pre-purchase check
- Nicotine stated as 2.0% (20 mg/ml) max, with the health warning present
- Puff count consistent with the liquid volume (roughly 2 ml per 1,000 puffs or less)
- Batch code present and matching the device
- Child-resistant, tamper-evident packaging
- Sold by an EU-based shop - so returns and warranty actually apply per our returns guide
Pass all five and you are looking at compliant stock from a seller who has nothing to hide.
Frequently asked questions
Is 2% the same as 20 mg?
Yes. 20 mg/ml equals 2.0% by volume. Percent is mg/ml divided by 10 - so 5% would be 50 mg/ml, which exceeds the EU limit and signals non-EU stock.
Why do EU vapes only have 2 ml pods?
It is a direct TPD requirement, not the manufacturer's choice - along with the 20 mg/ml cap and 10 ml bottle limit. The full rule set is in our TPD guide.
What does "nicotine salt 2%" mean?
It tells you both the strength (20 mg/ml) and the nicotine form: nicotine salt, which delivers a smoother throat hit at high strengths than freebase. The difference matters for choosing strengths - see freebase vs salts.
How do I know a puff count is realistic?
Compare devices by liquid volume and price per millilitre instead of the headline number. Puff counts assume short, consistent puffs that few real users maintain - our puff-count guide shows the math. If you are stepping strengths down over time, the step-down plan pairs well with learning to read these labels.
