If you’ve started exploring the world of vaping, you’ve likely come across the terms PG and VG on almost every e-liquid bottle. So what is the difference between PG and VG e-liquid, and why does it matter? In short, PG (propylene glycol) and VG (vegetable glycerine) are the two main base liquids used in e-liquid production, and the ratio between them directly affects flavour strength, throat hit, vapour output, and how the e-liquid performs in your device.
Understanding PG vs VG e-liquid isn’t just technical trivia. The ratio you choose shapes almost every part of your vaping experience, from how satisfying your favourite flavour tastes to how much vapour you produce and how well the e-liquid works with your specific kit. Get the ratio wrong for your setup, and you might end up with a leaking tank, a weak throat hit, or a flavour that falls flat. Get it right, and vaping becomes a far more enjoyable, consistent experience.
At Cloud 9 Liquid, we know that choosing the right e-liquid starts with understanding what’s actually inside the bottle. This guide breaks down PG and VG e-liquid in plain terms, covering what each ingredient does, how different ratios perform, and how to pick the right one for your device and preferences.
What Are PG and VG in E-Liquid?
PG (propylene glycol) and VG (vegetable glycerine) are the two base liquids that make up the majority of any e-liquid, alongside flavourings and, where selected, nicotine.
Propylene glycol is a thin, colourless liquid with almost no natural odour or taste of its own. It’s widely used across the food and pharmaceutical industries as a carrier for flavourings and active ingredients, which is exactly the role it plays in e-liquid. Because PG is so effective at carrying flavour compounds, it forms the backbone of most e-liquid recipes designed to deliver a strong, accurate taste.
Vegetable glycerine is a thicker, slightly sweet liquid derived from plant oils. It’s also used extensively in food, cosmetics, and personal care products. In e-liquid, VG is responsible for producing the dense vapour clouds that many vapers associate with sub-ohm and direct-to-lung setups.
Every bottle of e-liquid combines these two ingredients in a specific ratio, expressed as PG/VG, such as 50/50 or 70/30. That ratio, along with the flavouring and nicotine strength, determines the overall character of the e-liquid.
What Is the Difference Between PG and VG E-Liquid?
The core difference between PG and VG e-liquid comes down to consistency and function: PG is thin and flavour-forward, while VG is thick and vapour-focused.
Here’s how the two compare across the factors that matter most to vapers:
- Consistency: PG has a watery consistency, while VG is noticeably thicker and more viscous.
- Flavour delivery: PG carries flavour more efficiently, producing a sharper, more distinct taste.
- Throat hit: PG produces a stronger throat hit, similar to the sensation associated with traditional smoking.
- Vapour production: VG creates significantly denser and larger vapour clouds.
- Sweetness: VG has a naturally sweet taste, which can subtly influence the overall flavour profile.
- Device suitability: High PG e-liquid works well in low-power devices with higher resistance coils, while high VG e-liquid is better suited to sub-ohm devices and lower resistance coils.
Neither ingredient is objectively better. The right choice depends entirely on what you’re looking for in a vape and what device you’re using it in.
How PG Affects Flavour and Throat Hit
Higher PG e-liquid delivers a more pronounced throat hit and sharper flavour clarity, making it a common choice for vapers who want their e-liquid to feel closer to smoking.
Because propylene glycol carries flavouring compounds so effectively, high PG e-liquid tends to taste more distinct and true to its intended profile. If you’re vaping a menthol, fruit, or tobacco flavour, a higher PG ratio often brings out the individual notes more clearly, rather than blending them into a softer, sweeter overall taste.
PG is also largely responsible for the throat hit sensation, that slight catch at the back of the throat when inhaling. Many adult vapers, particularly those who have switched from smoking, find this sensation reassuring and familiar. It’s one of the reasons high PG e-liquid remains popular for mouth-to-lung vaping, where the draw more closely mimics that of a cigarette.
One practical consideration is that some vapers find PG mildly drying or irritating to the throat and sinuses when used in very high concentrations. This varies from person to person, and it’s worth starting with a moderate ratio if you’re unsure how you’ll respond.
How VG Affects Vapour Production and E-Liquid Consistency
Higher VG e-liquid produces thicker, denser vapour clouds and a smoother inhale, but delivers a softer throat hit and slightly muted flavour compared to high PG blends.
Vegetable glycerine’s thicker molecular structure means it produces far more visible vapour when heated. This is why high VG e-liquid is the standard choice for cloud-focused, direct-to-lung vaping styles, typically used with sub-ohm tanks and lower resistance coils that can handle the denser liquid.
The trade-off is a smoother, softer sensation on the inhale, with a much lighter throat hit than PG delivers. VG’s natural sweetness can also round off sharper flavour notes, giving high VG e-liquids a mellower overall taste profile.
Because VG is thicker, it also affects how the e-liquid behaves inside your device. It wicks more slowly through cotton coils, which is why high VG liquids generally need lower resistance coils and more airflow to vaporise properly without causing dry hits or a burnt taste.
Understanding Different PG/VG Ratios
E-liquid isn’t limited to a single fixed formula. Manufacturers blend PG and VG in a range of ratios to suit different vaping styles and devices.
50/50 PG/VG E-Liquid
An even 50/50 blend offers a balance between flavour intensity, throat hit, and vapour production. It’s a versatile option that works across a broad range of devices, including many starter kits and pod systems, making it a practical starting point for those new to vaping or unsure which ratio suits them best.
High PG E-Liquid (60/40 and above)
High PG e-liquid prioritises flavour clarity and throat hit over vapour volume. It’s generally thinner, making it compatible with higher resistance coils and mouth-to-lung devices that use less power and produce more restricted, cigarette-like draws.
High VG E-Liquid (70/30 and above)
High VG e-liquid is formulated for direct-to-lung vaping and sub-ohm devices. Its thicker consistency supports larger vapour clouds and requires coils built to handle higher liquid volumes, typically found in tanks designed for lower resistance, higher wattage setups.
Choosing between these isn’t just about preference. Using a high VG e-liquid in a device designed for high PG liquid (or vice versa) can lead to poor performance, including leaking, weak flavour, or damaged coils.
Choosing the Right PG/VG Ratio for Your Vaping Style and Device
The best PG VG ratio depends on your device type, your preferred vaping style, and whether you prioritise flavour and throat hit or vapour production.
Consider the following when deciding on a ratio:
- Mouth-to-lung vaping: If you draw vapour into your mouth before inhaling, similar to smoking a cigarette, a higher PG e-liquid (50/50 or above) generally performs better and suits starter kits and pod devices.
- Direct-to-lung vaping: If you inhale vapour straight into your lungs using a sub-ohm tank, a higher VG e-liquid (70/30 or higher) is typically required for the best performance and flavour output.
- Device compatibility: Always check your device and coil specifications before choosing an e-liquid. Coils built for higher resistance suit thinner, higher PG liquids, while low resistance sub-ohm coils are designed for thicker, higher VG liquids.
- Sensitivity to PG: A small number of people report mild sensitivity to propylene glycol. If you notice throat irritation or a dry mouth with high PG e-liquid, a higher VG ratio may feel more comfortable.
- Flavour versus cloud priority: If flavour accuracy and throat hit matter most to you, lean towards higher PG. If dense vapour and a smoother inhale are the priority, lean towards higher VG.
There’s no single “correct” ratio for everyone. The most suitable e-liquid is the one that matches both your device and your personal vaping preferences.
How Nicotine Strength Influences Your E-Liquid Choice
Nicotine strength is another key factor that works alongside your PG/VG ratio to shape your overall vaping experience. Higher nicotine strengths are typically paired with higher PG e-liquids and mouth-to-lung devices, since the stronger throat hit from PG helps balance the harsher sensation that higher nicotine concentrations can produce at higher wattages. Lower nicotine strengths, or nicotine-free options, are more commonly used with higher VG e-liquids in sub-ohm devices, where larger vapour volumes at higher power would make stronger nicotine concentrations too intense.
If you’re unsure which strength suits your needs, it’s worth reviewing our detailed guide to E-Liquid Nicotine Strengths, which explains the available options and how to choose a level that matches your vaping habits and device.
How to Choose an E-Liquid That Suits You
Bringing everything together, choosing the right e-liquid comes down to four main considerations:
- Your device: Match your PG/VG ratio to your device’s power output and coil resistance to avoid performance issues.
- Your vaping style: Mouth-to-lung vapers typically prefer higher PG ratios, while direct-to-lung vapers usually favour higher VG ratios.
- Your flavour and sensation preferences: Decide whether a stronger throat hit and sharper flavour, or smoother inhales and bigger clouds, matter more to you.
- Your nicotine needs: Select a nicotine strength that complements your chosen ratio and device, rather than choosing each element in isolation.
Exploring a range of options is often the best way to find your ideal combination. The Cloud 9 e-liquid range includes a variety of PG/VG ratios and flavours, giving adult vapers the flexibility to find a formulation that genuinely suits their setup and taste preferences.
Final Thoughts on PG vs VG E-Liquid
Understanding PG vs VG e-liquid gives you the knowledge to make a more informed decision rather than choosing a bottle at random. PG e-liquid delivers sharper flavour and a stronger throat hit, making it well suited to mouth-to-lung vaping and higher resistance devices. VG e-liquid produces thicker vapour and a smoother inhale, making it the preferred choice for direct-to-lung vaping and sub-ohm setups. Most e-liquids fall somewhere between these two extremes, blended in ratios designed to balance flavour, throat hit, and vapour production according to different vaping styles.
There’s no universally “better” option between PG and VG. The right choice depends on your device, your preferred vaping style, and what you personally want from your e-liquid, whether that’s bold flavour, a satisfying throat hit, big clouds, or a smooth, all-day vape.
If you’re ready to put this knowledge into practice, take a look at the full range of e-liquids available at Cloud 9 Liquid. With a variety of PG/VG ratios, nicotine strengths, and flavours to choose from, you can find an e-liquid that’s genuinely built around how you vape.