Matching your old disposable's nicotine hit with the right nic salt strength

One thing that trips people up when they move to a refillable kit is realising, often for the first time, that they now have to actually pick a nicotine strength. A disposable never really asked you that question. This is a practical look at what nic salt strength options mean, and how to use what you already know about your old habit to pick sensibly rather than guessing.

Why your disposable never really gave you a choice

Most single-use disposables sold in the UK, whatever the brand, were sold at or close to the regulatory ceiling of 20mg/ml nicotine. There wasn't usually a "low strength" version sitting next to it on the shelf, so if you vaped a disposable at all, you were almost certainly vaping at the top of the UK's legal range without ever consciously choosing it. That matters now because a refillable kit doesn't default you into anything. You buy a bottle, and the strength on the label is the strength you get.

For the background on why you're holding a refillable kit instead of a disposable in the first place, our explainer on the UK disposable vape ban covers what changed and why. This guide picks up from there, at the point where you're standing in front of a wall of bottles trying to work out which mg figure is actually right for you.

What the strength options actually are

Nic salt e-liquid, the type most closed and refillable pod kits are designed around, is commonly sold in the UK in 5mg, 10mg and 20mg strengths, usually in 10ml bottles at a standard 50/50 PG/VG mix built for a tighter, mouth-to-lung draw similar to what disposables used. Nic salts are generally described as giving a smoother throat hit at higher strengths than freebase e-liquid would, which is a formulation characteristic worth knowing rather than a claim about one being better for you. If you're new to nic salts and want a lower strength to start comparing against, something like Elux vape liquid 5mg is a common lower-strength starting point, sitting well below the 20mg most disposables were sold at.

Translating a disposable habit into a bottle strength

The simplest starting point is to treat 20mg as your rough "like for like" match, since that's what most disposables were, and adjust from there once you've actually used the kit for a week or two. A few things are worth weighing up before you settle on a number:

• How often you actually reached for the disposable. Someone who picked one up occasionally through the day is in a different position to someone who vaped almost constantly, even if both were on the same 20mg strength.
• Whether the switch itself has already changed your habit. A pod kit adds small bits of friction a disposable didn't have, charging it, refilling it, having it in a different pocket, and a lot of people find they simply use it less often without trying to.
• How the draw compares. If your new kit has a tighter or looser draw than your old disposable, that changes how much you actually take in per puff, separately from the mg figure on the bottle.

If you're still deciding on the kit itself rather than just the e-liquid, our guide to refillable pod kits that feel like a disposable covers coil resistance and draw in more detail, both of which affect how a given nicotine strength actually feels in practice.

Why a lower strength like 5mg can work better than you'd expect

It sounds counterintuitive to go from a 20mg disposable straight to a 5mg bottle, but for some people who've already switched to a pod kit, it works out fine, and the reason usually isn't really about the strength itself. If the switch has already cut down how often you're vaping through the day, purely because a pod kit takes a bit more thought than a disposable did, then the total nicotine you're taking in can drop even before you touch the mg figure. Many vapers who notice that pattern find a lower strength keeps pace with a habit that's already changed, rather than needing to force it down separately.

That's not a rule, and it won't hold for everyone. If you're vaping just as often as you did before, or you've found yourself pulling harder or more frequently on a lower-strength bottle to get the same satisfaction, that's a sign 5mg is too big a jump and a 10mg or 20mg bottle is the more sensible match for now.

A simple way to test your own level

Because 10ml bottles are cheap relative to a disposable, typically a couple of pounds each, there's not much downside to testing rather than guessing. Buy one bottle at what you think is your match (20mg if you want a safe starting point closest to your old disposable), and one a step down. Use the higher strength as normal for a few days, then switch to the lower one for a similar stretch and pay attention to two things: whether you're reaching for the kit noticeably more often, and whether the throat hit feels thin or unsatisfying compared with before. If neither changes much, the lower strength is doing the job with less nicotine overall. If you're vaping more or it feels flat, step back up.

A few honest caveats

Nicotine needs vary a lot from person to person, and nothing here is a substitute for paying attention to how you actually feel on a given strength. We can't tell you which of 5mg, 10mg or 20mg is right for you specifically, only lay out how the options relate to what a disposable habit typically looked like. This isn't health advice and it isn't a claim that any one strength is safer or better than another, they're simply different points within the UK's legal 20mg/ml limit. If you're finding it hard to manage your nicotine use at any strength, that's worth raising with a pharmacist or GP rather than working it out through trial and error alone.