A sub ohm kit uses a coil with a resistance below 1 ohm, and the spec sheet tells you most of what you need to know. Read the coil's ohms, the tank size, the battery figure and the liquid it suits before you order. Look for a tank of 2ml or less and a strength in mg/ml (never above 20mg/ml). Single-use vapes have been banned since 1 June 2025, and you must be 18 or over to buy.

The numbers on the listing are the whole conversation.

If you're an adult smoker looking to buy sub ohm vape kits UK, you've probably met a wall of figures: ohms, watts, mAh and ml. Fair enough, it reads like the spec sheet for a small appliance. But each figure answers one plain question, and once you know the questions, a listing takes a couple of minutes to read.

You're probably wondering which ones matter. Realistically, five or six of them do, and the manual covers the rest.

This guide is written for adult smokers, nobody else. So how do you read the spec sheet?

What Should You Know Before You Buy Sub Ohm Vape Kits UK?

Start with the rules, because they apply to every kit. Single-use vapes have been banned since 1 June 2025, so a legal kit has to be rechargeable and either refillable or take replaceable pods.

A brand name or a long spec list doesn't change any of this. Specs vary by kit, so always read the listing and the manual.

What Does "Sub Ohm" Actually Mean?

It means the coil's resistance is below 1 ohm. That's all. It describes the coil, not the whole kit, and it says nothing about whether the kit is right for you.

Shops often file these under advanced vape kits because they have more figures to understand, though that's a label, not a technical term. In other words, sub ohm is a coil feature. Everything else on the listing still needs checking, and the manual names the coil and liquid that go together.

How Do You Read the Spec Sheet?

One line at a time. Here's the general picture, though individual kits differ.

Say a listing shows a 0.8 ohm coil, a 2ml tank and a battery figure in mAh. Below 1 ohm, so it's a sub ohm coil. A 2ml tank is within the UK limit. And the mAh figure tells you the battery's size, not how long a day it'll last.

What Does That Mean for Your Liquid?

Check the manual first, because the coil and the liquid are a pair. A strength on its own tells you little until you know the tank size. To work out what's in a full tank, multiply the strength (in mg/ml) by the tank size (in ml).

This table is just an illustration of the arithmetic, not a recommendation about what to choose. To convert mg/ml to a percentage, divide by 10. Choosing a strength is a personal decision, so read the label, change one thing at a time and ask a pharmacist or an NHS stop smoking service if you want guidance.

What Should You Check Before You Order?

The same short list every time. Before you order, check who's selling, and that includes us. A UK retailer should verify you're 18 or over, sell TPD-compliant products only and show clear delivery and returns information.

•         Tank size. Stated as 2ml or less.

•         Coil details. The ohms, and the liquid the manual pairs with it.

•         Charging. The listing should say how the device recharges.

•         Spares. Can you buy another coil later?

Plenty of people end up searching for the best vape store UK the night a coil gives out, which is a bad time to be choosing. Don't take our word for it, compare us with anyone else. We won't promise delivery times here, so check the seller's terms. We won't quote prices either, because they change. And if a price is far below everyone else's, ask why.

What Mistakes Catch People Out?

Mostly small ones. Here's the short list.

1.       Mismatching coil and liquid. The manual names the pair.

2.       Ignoring the tank size. It should be 2ml or less.

3.       Reading mAh as hours. It's the battery's size, not a promise.

4.       Mixing up mg and mg/ml. They aren't the same thing.

5.       Skipping the manual. Charging and filling advice varies by model.

None of these is dramatic. But each one is how a sensible purchase ends up in a drawer.

The HillCrest Clouds View

Honestly? Spec sheets aren't hard, they're just written for people who already know the vocabulary. The trouble is that nobody explains the words, so people guess, and a guess on a coil is an expensive one.

So our advice is boring but it works. Learn the six terms, check them against the manual and ask the seller when a figure is missing. We'd rather you tell us a listing wasn't clear than hear a kit ended up in a drawer. It saves you money, and it saves us the returns.

And a plain reminder. The NHS describes vaping as substantially less harmful than smoking for adult smokers who switch. If you don't smoke, none of this is for you.

Frequently Asked Questions

What is a sub ohm vape kit?

It's a kit with a coil whose resistance is below 1 ohm. That describes the coil, not the whole device. Check the manual for which liquid suits it, and the listing for the tank size, which in the UK must be 2ml or less.

What does ohm mean on a vape?

It's the resistance of the coil, measured in ohms. Below 1 ohm is called sub ohm. The figure helps you match coil and liquid, so check the manual for what it recommends. It doesn't tell you the kit is legal or that it suits you.

Are sub ohm vape kits legal in the UK?

Yes, if the product meets UK rules. That means a tank of 2ml or less, nicotine liquid in bottles of 10ml or under and a strength of 20mg/ml at most. Check the listing for each, and ask the seller if any figure is missing.

What does mAh mean on a vape?

It's the battery's capacity, in milliamp hours. A bigger figure means a bigger battery, not a guaranteed length of use, because that depends on the device and how you vape. Charge only as the manual says, and compare it with the charging details on the listing.

Are single-use vapes still legal in the UK?

No. Single-use vapes have been banned since 1 June 2025. A legal product is rechargeable and either refillable or takes replaceable pods. If a listing doesn't say how the device recharges or what size the tank is, ask the retailer before you order.

Where should I buy a sub ohm vape kit in the UK?

Choose a UK retailer that checks you're 18 or over, sells TPD-compliant products and shows clear delivery and returns details. Always check the compatibility note. Be wary of prices far below everyone else's, and compare current listings. Check the label when your order arrives.

Conclusion

A spec sheet is six questions, so ask them. Check the coil's ohms, the tank size, the battery figure, the liquid it suits and the strength before you order, then ask the seller about anything that's missing.

Remember the 2ml, 10ml and 20mg/ml limits and store everything out of reach of children. A few minutes of checking can save you a kit that never gets used, and there's no prize for choosing quickly. If you already know which kit suits you, now's a sensible time to browse our range.