What Is Vape Wattage?
A clear UK guide to vape wattage, what the numbers mean for your vape and how to set wattage for best coil life and flavour.
Wattage is the amount of electrical power your vape uses to heat the coil.
Higher wattage means more heat, more vapour and more intense flavour. Lower wattage means cooler vape with smaller clouds. Each coil has a recommended wattage range printed on it. Operating outside this range either burns the coil at too high or produces weak vapour at too low. Adjustable wattage is standard on UK vape mods.
Wattage is the most important setting on adjustable vape devices. Setting it correctly is the difference between satisfying vape and burnt coils. The good news is most coils have the correct range printed on them. The bad news is many UK vapers ignore this and either over fire or under fire their gear.
How wattage affects your vape
Four direct effects flow from wattage settings. The grid below covers each.
Vapour volume
Higher wattage produces more vapour. Each watt above the minimum increases cloud size.
✓ Cloud sizeFlavour intensity
Mid range wattage typically gives best flavour. Too high or too low both reduce flavour quality.
✓ Sweet spotTemperature
Higher wattage runs hotter, which can scorch cotton and create harsh dry vape.
⚠ Heat warningCoil life
Operating at the high end of the recommended range shortens coil life by 30 to 50 percent.
⚠ Cost factorRecommended wattage by coil type
The table below covers the typical UK wattage settings for common coil resistances.
| Coil resistance | Recommended wattage |
|---|---|
| 1.0 to 2.0 ohm MTL | 10 to 18W |
| 0.6 to 0.8 ohm restricted DTL | 20 to 35W |
| 0.4 to 0.5 ohm sub ohm | 35 to 60W |
| 0.2 to 0.3 ohm sub ohm | 50 to 80W |
| 0.15 ohm cloud chaser | 60 to 100W or higher |
Why staying in range matters
The wattage range printed on coils is calculated for the wire mass, cotton type and surface area of that specific coil. Operating below the range produces weak vapour and poor flavour. Operating above the range overheats the cotton, producing harsh dry vape and burnt taste. Within the range, the lower end gives cooler vape and longer coil life. The upper end gives bigger clouds and shorter coil life. Most UK vapers settle in the middle of the range for balance.
Most UK vape mods detect coil resistance automatically and suggest a default wattage in the recommended range. This is a good starting point but personal preference matters. Some vapers prefer the slightly cooler lower end. Others want higher cloud production at the upper end. Adjusting one or two watts at a time finds your personal sweet spot.
How to dial in your wattage
The checklist below covers what UK vape shop staff most often recommend.
Wattage tuning checklist
Use four or more of these to find your ideal wattage.
- Start at the lower end of the coil's recommended range
- Increase one or two watts at a time and assess feel
- Stop when flavour starts to deteriorate or get harsh
- Note your preferred wattage for each coil type
- Lower wattage if e-liquid runs out faster than expected
- Lower wattage if coils burn out faster than 1 to 2 weeks
Variable wattage versus variable voltage
Modern UK vape mods almost universally use variable wattage which is easier to set than older variable voltage mods. With wattage you set the power directly. With voltage you must calculate power based on coil resistance. Watts equals volts squared divided by ohms. Most UK vapers find wattage mode easier and stick with it. Voltage modes still exist for advanced users who prefer manual control.
Wattage interacts with battery and coil specifications, which our our guide on what is a vape mod covers, plus our article on what is a vape coil explains the battery requirements that limit safe wattage.
Frequently asked questions
What wattage should I vape at?
Within the range printed on your coil. Start at the lower end and adjust to taste.
Will higher wattage produce better flavour?
Up to a point yes. Beyond the coil's recommended range flavour deteriorates and becomes harsh.
Why does my vape taste burnt at high wattage?
Cotton is overheating. Lower wattage to within the recommended coil range.
Does high wattage drain battery faster?
Yes proportionally. Doubling wattage roughly doubles battery drain rate.
Can I use any wattage on any coil?
No. Coils outside their recommended range produce poor results or fail.
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