How to choose the right nicotine strength?

Disclaimer: This article is for educational purposes only and intended for adult smokers (18+) in New Zealand. It is not medical advice.

What is nicotine?

Before choosing an e-liquid nicotine strength, it helps to first understand what nicotine actually is and how it works differently in vaping compared to traditional cigarettes. Nicotine is a naturally occurring compound most commonly associated with the tobacco plant, although it can also be found in smaller amounts in vegetables like tomatoes, potatoes, and eggplants. In vaping products, nicotine is usually extracted from tobacco or produced synthetically before being blended into e-liquid alongside ingredients such as Propylene Glycol (PG) and Vegetable Glycerin (VG).

Unlike cigarettes, which rely on combustion and produce smoke along with various byproducts, vaping heats e-liquid into vapour instead. This allows nicotine to be delivered without the burning process associated with smoking. Because of this difference, many adult vapers prefer vaping as a way to better control their nicotine intake and explore different nicotine concentrations depending on their personal preferences and previous smoking habits.

Nicotine strength in e-liquids is typically measured in milligrams per millilitre (mg/mL), and understanding these strengths can make it easier to choose a vape setup that feels comfortable and balanced. Lower nicotine strengths are are commonly used by vapers who enjoy lighter nicotine levels or use higher-powered devices, while higher concentrations are commonly found in pod systems and more compact devices designed for a smoother nicotine delivery experience.

Since every vaper’s preference can vary, learning how nicotine strengths work is an important step when comparing vape products, understanding e-liquid labels, and exploring the differences between nicotine salts, freebase nicotine, and various vape device types.

Measuring nicotine strength

Understanding how nicotine strength is measured can make choosing an e-liquid much easier, especially for newer vapers comparing different products and device types. Most vape products display nicotine strength in either milligrams per millilitre (mg/mL) or as a percentage, and both measurements refer to the amount of nicotine contained in the e-liquid.

Milligrams per Millilitre (mg/ml)

Milligrams per millilitre, often written as mg/mL, is the most common format used on e-liquid labels. For example, a vape juice labelled 10mg/mL contains 10 milligrams of nicotine in every millilitre of liquid. Some brands instead use percentages, where 2% nicotine is equivalent to 20mg/mL. Since both formats are widely used across vape products, understanding the conversion can help when comparing nicotine strengths between different brands and devices.

Most e-liquids are available in strengths ranging from 0mg, which contains no nicotine, up to 20mg in markets such as New Zealand where nicotine concentration limits apply. Nicotine strength can also vary depending on the type of nicotine used in the e-liquid, as freebase nicotine and nicotine salts are designed to provide different vaping experiences.

Freebase nicotine

Freebase nicotine is the more traditional form commonly used in earlier vape liquids and cigarettes. It is often found in lower nicotine strengths such as 3mg or 6mg and is usually paired with higher-powered devices designed for larger vapour production. Because freebase nicotine can create a stronger throat sensation at higher concentrations, many vapers using sub-ohm or direct-to-lung (DTL) devices tend to prefer lower nicotine levels during longer vaping sessions.

Nicotine salts

Nicotine salts are formulated to allow higher nicotine strengths with reduced harshness compared to freebase nicotine. By adjusting the nicotine formulation, nic salts can deliver nicotine more comfortably while also absorbing more quickly compared to traditional freebase nicotine. This is one reason why nicotine salts are commonly used in pod systems and mouth-to-lung (MTL) devices, which are designed to provide a more compact and lower-powered vaping experience.

Since different nicotine types and strengths can feel very different depending on the device being used, understanding the difference between freebase nicotine and nicotine salts can help vapers better compare e-liquids, pod systems, and vape setups based on their own preferences and vaping habits.

E-liquid strength chart

The Role of Vaping Device to Nicotine

Continuing from the earlier sections on nicotine strength and nicotine types, it’s also useful to understand how vaping devices influence the way e-liquid is used. Device type affects how much vapour is produced per puff, which in turn influences what nicotine strength is typically selected.

Lower-powered devices, such as pod systems and starter kits, are generally designed for mouth-to-lung (MTL) vaping. This style involves a tighter inhale that is closer to the experience of smoking. These devices produce smaller amounts of vapour per puff and are commonly used with higher nicotine concentrations, typically in the range of around 5mg to 20mg. In many cases, nicotine salts are used in these devices due to their smoother feel at higher strengths and their suitability for low-wattage setups.

In contrast, higher-powered devices, commonly referred to as sub-ohm devices, are designed for direct-to-lung (DTL) vaping. This involves a deeper inhale and produces a larger volume of vapour. Because each puff delivers more vapour, lower nicotine strengths are generally used, often around 0mg to 6mg, to align with higher vapour output. Freebase nicotine is more commonly used in this type of setup due to its performance at lower concentrations.

MTL and DTL vaping styles are often associated with different usage preferences. MTL setups tend to be used with more compact devices and higher nicotine concentrations, while DTL setups are more commonly used with larger devices and lower nicotine levels. These differences mainly relate to device output and vapour production rather than user preference alone.

Matching nicotine strength to device type helps ensure the e-liquid is used in a way that aligns with the device’s intended performance. Pod systems and low-wattage devices are typically paired with higher nicotine strengths in smaller vapour volumes, while sub-ohm devices are generally paired with lower strengths due to their higher vapour output.

When viewed alongside earlier topics such as nicotine measurement and nicotine types, this helps form a clearer understanding of how e-liquid strength, formulation, and device design work together.

Conclusion

In summary, nicotine strength in e-liquids is best understood as part of a system that includes measurement, nicotine type, and device design. Nicotine is typically measured in mg/mL or percentages, and is available in forms such as freebase nicotine and nicotine salts, which behave differently depending on how they are used.

Device type also plays an important role. Lower-powered pod systems are generally used with higher nicotine strengths and smaller vapour output, while sub-ohm devices are usually paired with lower nicotine levels due to higher vapour production per puff.

Overall, choosing an appropriate nicotine strength depends on how these factors work together rather than a single fixed rule. Understanding this relationship helps support understanding when comparing e-liquid strengths and device types.