If you’ve ever stood in front of a wall of vape e-liquid bottles wondering why one says 50/50 and another says 70/30, you’re asking the right question at the right time. The PG/VG ratio is the single biggest factor that determines how your vape juice feels, how it tastes, how much vapour it produces, and even how long your coils last. Get it wrong and you’ll end up with a device that gurgles, a throat hit that’s either too harsh or barely there, or clouds that disappoint. Get it right and vaping becomes exactly what it should be: smooth, flavourful, and satisfying.
This guide breaks down exactly what PG/VG ratio means, how each ingredient behaves inside your device, and which ratio suits your specific vaping style, whether you’re using a simple pod system, a starter kit, or a sub-ohm tank built for clouds. By the end, you’ll know precisely what PG/VG ratio you should use, and you’ll understand why Cloud 9 Liquid formulates its range the way it does.
What Is a PG/VG Ratio?
A PG/VG ratio refers to the proportion of propylene glycol (PG) to vegetable glycerin (VG) in an e-liquid. These are the two base liquids that carry the flavourings and nicotine in every bottle of vape juice. When a bottle is labelled 50/50, it contains equal parts PG and VG. A 70/30 bottle contains 70% VG and 30% PG, and so on.
Both ingredients are widely used, food-safe substances found in countless everyday products, from asthma inhalers to toothpaste and baked goods. In e-liquid, however, their job changes slightly. PG carries flavour and delivers the throat hit that mimics the sensation of smoking, while VG produces the thick vapour clouds vapers associate with sub-ohm setups. Neither ingredient is “better” than the other; they simply do different jobs, and the correct ratio depends entirely on how you vape.
Why the Ratio Matters More Than People Realise
Many new vapers assume all e-liquid works the same way in any device. It doesn’t. A high PG liquid poured into a sub-ohm tank built for high VG juice will often flood the coil and taste burnt within days. Equally, a high VG liquid used in a low-power pod kit may struggle to wick properly, leading to dry hits and a shortened coil lifespan. Choosing the right PG/VG ratio isn’t a minor preference; it directly affects performance, flavour, coil longevity, and overall satisfaction.
What Does PG Do in Vape Juice?
Propylene glycol is a thin, almost water-like liquid that carries flavour exceptionally well. If you’ve ever noticed that a high PG e-liquid tastes sharper and more distinct than a very thick VG blend, that’s PG doing its job.
PG is responsible for three main things in an e-liquid:
- Throat hit: PG creates that familiar tightening sensation at the back of the throat, similar to inhaling traditional cigarette smoke. This is a major reason ex-smokers often prefer higher PG ratios when they first switch to vaping.
- Flavour clarity: Because PG is thinner, it distributes flavour compounds more evenly, so subtle notes in fruit, tobacco, or menthol flavours come through more clearly.
- Wicking speed: PG’s low viscosity means it soaks into cotton wicks quickly, which suits low-wattage devices with tighter airflow, such as pod systems.
The trade-off is vapour volume. High PG e-liquid produces noticeably less vapour than high VG juice, which is exactly why it suits discreet, mouth-to-lung vaping rather than cloud chasing.
What Does VG Do in E-Liquid?
Vegetable glycerin is thicker and slightly sweet on its own. Its main role in vape e-liquid is vapour production. The higher the VG content, the denser and more voluminous the clouds.
VG contributes in the following ways:
- Vapour density: High VG e-liquid, typically 70% VG or above, is the standard choice for sub-ohm devices designed to produce big clouds.
- Smoothness: VG is gentler on the throat than PG, so high VG blends feel softer to inhale, even at higher wattages.
- Sweetness: VG has a naturally sweet taste that can slightly round off sharper flavour notes, which some vapers enjoy and others find masks flavour subtlety.
The downside of high VG e-liquid is viscosity. Thicker juice takes longer to soak into wicking material, so it needs devices with larger wicking ports and more airflow, otherwise you’ll experience dry hits and premature coil wear.
PG vs VG: The Key Differences at a Glance
Understanding PG vs VG side by side makes the decision far easier.
| Factor | PG (Propylene Glycol) | VG (Vegetable Glycerin) |
| Consistency | Thin, water-like | Thick, syrupy |
| Throat hit | Strong | Mild |
| Vapour production | Low | High |
| Flavour delivery | Sharp and clear | Softer, slightly sweet |
| Best suited to | Pod systems, MTL devices | Sub-ohm tanks, DTL devices |
| Coil wicking | Fast | Slower, needs bigger ports |
Neither side of the PG vs VG comparison is objectively superior. The right choice comes down to your device, your vaping style, and how strong a throat hit you want.
Which PG/VG Ratio Is Best for Beginners?
New vapers, particularly those switching from smoking, almost always do best starting with a 50/50 e-liquid ratio. This balanced blend gives a satisfying throat hit without overwhelming harshness, produces a moderate amount of vapour, and works reliably across almost every entry-level device, including pod kits and basic vape pens.
50/50 e-liquids are also generally compatible with both freebase nicotine and nicotine salts, which makes them the safest starting point while you work out your personal preferences. Cloud 9 Liquid’s range includes 50/50 options specifically formulated for this kind of smooth, no-fuss introduction to vaping.
Is 50/50 PG/VG Better Than 70/30?
Neither is objectively better. A 50/50 ratio suits low-power pod systems and delivers a stronger throat hit with clearer flavour, making it ideal for beginners and mouth-to-lung vapers. A 70/30 ratio suits higher-power sub-ohm devices and produces noticeably more vapour with a smoother inhale. The right answer depends on your device and what you want from the experience, not which ratio is “superior.”
Which PG/VG Ratio Suits Your Device?
This is where most buying mistakes happen. Matching your e-liquid ratio to your hardware is the single most important step in choosing the right vape juice.
Pod Systems and Nicotine Salt Devices
Pod systems are built for low wattage and tight, mouth-to-lung draws. They typically use small wicking ports, so thick e-liquid struggles to feed the coil properly. A 50/50 ratio is the standard choice here, and it’s also the reason most nicotine salt e-liquids are formulated at 50/50. The thinner consistency wicks fast enough to keep up with frequent, quick puffs, while still delivering enough vapour to feel satisfying.
Starter Kits and Entry-Level Vape Pens
Starter kits sit between pod systems and full sub-ohm setups. Most work well with 50/50 or 60/40 e-liquid, giving a bit more vapour than a pod system while still maintaining a strong throat hit and reliable wicking. If your starter kit has adjustable airflow, a 60/40 blend often hits a nice middle ground.
Sub-Ohm Tanks and Cloud-Focused Devices
Sub-ohm devices run coils with a resistance below 1 ohm, pushing more power through thicker wicking material and wider airflow channels. These devices are built specifically for high VG e-liquid, typically 70/30 or 80/20. The extra VG content wicks properly at higher wattages and produces the dense, billowing clouds sub-ohm vaping is known for. Using a high PG e-liquid in a sub-ohm tank often causes a harsh, almost peppery throat hit and can flood the coil.
Choosing the Right Ratio for Nicotine Type
Your nicotine format matters just as much as your device when settling on a PG/VG ratio.
Nicotine Salts
Nicotine salts are absorbed more efficiently and more smoothly than freebase nicotine, even at higher strengths. This smoother absorption means nic salts don’t need as much PG to soften the hit, which is exactly why the best PG/VG ratio for nicotine salts is almost always 50/50. This ratio also happens to suit the pod systems that nic salts are typically vaped in.
Freebase Nicotine
Freebase nicotine, the traditional form used in most vape juice, delivers a stronger throat hit at equivalent strengths and is available across a much wider range of PG/VG ratios, from 50/50 right through to 80/20 high VG e-liquid. This makes freebase the more flexible option if you want to experiment with bigger clouds or sub-ohm vaping, since you’re not restricted to lower-power pod devices the way nic salts often are.
Flavour Intensity and Vapour Production Across Different Ratios
If flavour is your priority, higher PG e-liquid tends to deliver sharper, more distinct taste, particularly with citrus, menthol, and tobacco profiles where clarity matters. VG’s natural sweetness can round off some of that sharpness, so very high VG blends occasionally taste slightly muted in comparison, even when using an identical flavour concentrate.
If cloud production is your priority, higher VG e-liquid is non-negotiable. Vapour density scales directly with VG content, which is why competitive cloud vapers and sub-ohm enthusiasts almost always reach for 70/30 or 80/20 blends.
Most vapers find that 50/50 or 60/40 e-liquid strikes a sensible balance, offering solid flavour with a reasonable amount of vapour, which explains why these ratios remain some of the most popular across the UK vaping community.
Understanding Viscosity and Device Compatibility
Viscosity is the thickness of a liquid, and it dictates how well an e-liquid wicks through cotton inside your coil. This is a technical detail that beginners often overlook, yet it has a direct impact on both flavour and coil lifespan.
Can the Wrong PG/VG Ratio Damage Your Vape Coil?
Yes, absolutely. Using high VG e-liquid in a device built for thinner juice, such as a small pod system, can cause the wick to dry out between puffs because the thick liquid can’t feed through fast enough. This leads to burnt hits and coils that fail within days rather than weeks. Conversely, using very high PG e-liquid in a sub-ohm tank designed for thicker juice can oversaturate the wick, causing leaking, spitting, and a harsh, almost stinging throat hit.
Matching viscosity to your device’s wicking design isn’t just about taste, it directly extends how long your coils last and protects your investment in hardware.
Coil Lifespan and Wicking Performance
As a general rule, thinner e-liquid (higher PG) wicks faster and suits smaller coils with tighter wicking ports, while thicker e-liquid (higher VG) needs larger ports and more saturated cotton to wick properly. Using the correct ratio for your specific coil type typically extends coil life, reduces dry hits, and keeps flavour consistent from the first puff to the last.
Common Mistakes Beginners Make When Choosing an E-Liquid Ratio
Even experienced vapers occasionally get this wrong, but beginners run into a handful of predictable pitfalls:
- Buying high VG e-liquid for a pod system because clouds look appealing online, then wondering why the device leaks or burns out coils quickly.
- Assuming all vape juice behaves the same regardless of device, leading to disappointing flavour or harsh throat hits.
- Ignoring nicotine strength alongside ratio, pairing high nicotine freebase with a device meant for lower strengths, which results in an unpleasant, overly harsh experience.
- Sticking with one ratio forever without experimenting, even when their vaping style or device changes.
- Overlooking flavour category, since fruit and menthol e-liquids often perform differently across ratios compared with dessert or tobacco profiles.
Avoiding these mistakes usually comes down to matching your e cig liquids to your specific hardware and being honest about whether you’re chasing throat hit, flavour, or clouds.
Tips for Switching Between PG/VG Ratios
Moving between ratios is common as vapers develop their preferences or switch devices. A few practical tips make the transition smoother:
- Change your ratio gradually. Jumping from 50/50 straight to 80/20 can feel like a big shift in throat hit and vapour. Stepping through 60/40 or 70/30 first helps your palate and throat adjust.
- Clean or replace your coil when switching significantly. Residue from a different ratio can affect flavour in the new liquid, particularly when moving from high VG to high PG.
- Adjust your nicotine strength if needed. Higher VG blends can feel smoother, which sometimes leads vapers to increase wattage and inhale more deeply, effectively increasing nicotine intake even at the same strength.
- Match wattage to the new ratio. Higher VG juice generally performs better at higher wattages, while higher PG liquid suits lower-power draws.
- Give it a few days. Your preference for a ratio often settles after several days of consistent use rather than a single session.
Choosing the Right Ratio Based on Your Vaping Style
Your personal vaping style is often the deciding factor once device and nicotine type are settled.
- Mouth-to-lung (MTL) vapers, who draw vapour into the mouth first before inhaling, almost always prefer 50/50 or 60/40 e-liquid for its stronger throat hit and tighter draw compatibility.
- Direct-to-lung (DTL) vapers, who inhale straight into the lungs, generally prefer 70/30 or 80/20 high VG e-liquid, matched with sub-ohm hardware for maximum vapour.
- Flavour chasers who prioritise taste over throat hit or cloud size often settle on 50/50 or 60/40, since these ratios balance PG’s clarity with enough VG to keep the vapour satisfying.
- Discreet vapers, such as those vaping in public or workplace settings, tend to favour higher PG e-liquid in pod systems, since it produces less visible vapour and a smaller scent footprint.
UK Vaping Preferences and Current Market Trends
The UK vaping market has shifted noticeably in recent years towards nicotine salt e-liquids and compact pod systems, largely driven by convenience and the smoother nicotine delivery nic salts offer at higher strengths. This has pushed 50/50 e-liquid ratios into continued popularity, since they’re the standard formulation for most nic salt products and pod-friendly starter kits.
At the same time, sub-ohm vaping retains a loyal following among experienced vapers who prioritise flavour depth and cloud production, keeping demand steady for high VG e-liquid in the 70/30 and 80/20 range. Flavour variety also continues to shape buying decisions across the UK, with fruit, menthol, and dessert profiles remaining consistently popular across both pod-friendly and sub-ohm formulations.
Cloud 9 Liquid keeps pace with these preferences by offering a genuine spread of ratios and nicotine formats across its vape e-liquid range, so customers aren’t forced to compromise between device compatibility, throat hit, and flavour performance.
How Do I Choose the Right E-Liquid Ratio? A Quick Practical Framework
If you’re still unsure what PG/VG ratio you should use, run through this straightforward checklist:
- Identify your device type. Pod system or starter kit points towards 50/50 or 60/40. Sub-ohm tank points towards 70/30 or 80/20.
- Decide on nicotine format. Nic salts pair best with 50/50. Freebase gives you flexibility across the full ratio range.
- Prioritise your goal. Strong throat hit and clear flavour favour higher PG. Big clouds and a smoother inhale favour higher VG.
- Check your device’s wattage range. Lower wattage suits thinner, higher PG liquid. Higher wattage suits thicker, higher VG liquid.
- Start balanced if in doubt. A 50/50 e-liquid is the safest, most universally compatible starting point for anyone new to vaping or trying a new device.
Frequently Asked Questions
What is a PG/VG ratio?
A PG/VG ratio is the proportion of propylene glycol to vegetable glycerin in an e-liquid, such as 50/50 or 70/30, and it determines throat hit, vapour production, and flavour delivery.
What does PG do in vape juice?
PG carries flavour clearly, delivers a stronger throat hit similar to smoking, and wicks quickly, making it ideal for pod systems and mouth-to-lung vaping.
What does VG do in e-liquid?
VG produces thick, dense vapour clouds, feels smoother on the throat, and adds a mild natural sweetness, making it the preferred base for sub-ohm and cloud-focused vaping.
Which PG/VG ratio produces the most flavour?
Higher PG ratios, such as 50/50 or 60/40, typically deliver sharper, more distinct flavour, particularly in citrus, tobacco, and menthol profiles.
Which ratio creates the biggest clouds?
High VG e-liquid, generally 70/30 or 80/20, produces the largest vapour clouds and is the standard choice for sub-ohm devices.
Which PG/VG ratio is best for beginners?
A 50/50 ratio is best for beginners, offering a balanced throat hit, moderate vapour, and reliable compatibility with most entry-level devices.
Which ratio works best for pod systems?
Pod systems perform best with 50/50 e-liquid, since their smaller wicking ports and lower wattage suit thinner, faster-wicking juice.
Which ratio is ideal for sub-ohm vaping?
Sub-ohm devices are designed for 70/30 or 80/20 high VG e-liquid, which wicks properly at higher wattages and maximises vapour production.
What is the best PG/VG ratio for nicotine salts?
50/50 is the standard and most reliable ratio for nicotine salts, matching both their smooth absorption and the pod systems they’re typically vaped in.
Can the wrong PG/VG ratio damage my vape coil?
Yes. Using thick, high VG e-liquid in a device built for thinner juice can cause dry, burnt hits, while using thin, high PG liquid in a sub-ohm tank can oversaturate the wick and cause leaking.
Final Thoughts: Finding Your Perfect Vape E-Liquid Match
Choosing the right PG/VG ratio isn’t about following a trend or picking whatever bottle looks appealing on a shelf. It’s about matching your e-liquid to your device, your nicotine preference, and what you actually want from your vape, whether that’s a satisfying throat hit, clear flavour, or clouds that fill the room. A 50/50 e-liquid suits pod systems and beginners perfectly, while a 70/30 or 80/20 high VG e-liquid is built for sub-ohm setups and serious cloud production. There’s no universally “correct” answer, only the right ratio for your specific setup.
Cloud 9 Liquid formulates its entire vape e-liquid range with exactly this in mind, offering a genuine spread of PG/VG ratios, nicotine strengths, and flavour categories so you never have to compromise on performance or taste. Whether you’re just making the switch from smoking or you’re a seasoned vaper fine-tuning your setup, browse the full Cloud 9 Liquid collection today and find the e cig liquids that are formulated to match exactly how you vape.