E-liquid formulation involves several ingredients that work together to create the characteristics of a finished vape liquid. Among the most important are vegetable glycerin (VG) and propylene glycol (PG), two base liquids that influence viscosity, flavour delivery, aerosol production and the way an e-liquid interacts with vaping hardware.
The VG PG ratio describes the proportion of these two ingredients within an e-liquid base. Common formulations include 50/50 blends, higher-VG mixtures and higher-PG mixtures. Each formulation provides a different balance of physical and sensory characteristics, making the ratio an important consideration in e-liquid development.
What Is the VG/PG Ratio?
The VG PG ratio indicates the relative amount of vegetable glycerin and propylene glycol in an e-liquid.
For example, a 50/50 formulation contains approximately equal proportions of VG and PG. A 70/30 VG PG ratio generally indicates a formulation containing approximately 70% VG and 30% PG.
These proportions provide a basic description of the e-liquid’s base composition. Other ingredients, such as flavour concentrates and nicotine where applicable, may also be present.
The ratio gives consumers and manufacturers useful information about the liquid’s expected physical properties and intended hardware applications.
Why Is VG Important in E-Liquid?
Vegetable glycerin is a thick, colourless liquid commonly used in e-liquid formulations. One of its most notable characteristics is its viscosity.
VG is also associated with greater aerosol production. E-liquids containing a higher proportion of VG are generally formulated to produce denser clouds when used with suitable hardware.
VG contributes to the overall mouthfeel of an e-liquid as well. Its characteristics can create a smoother and fuller sensation during aerosol production.
These properties make VG an important component when manufacturers develop e-liquids intended for particular vaping systems.
Why Is PG Important?
Propylene glycol has a thinner consistency than VG and is widely used as a carrier for flavour compounds.
PG can contribute to flavour clarity and is also associated with a more noticeable throat sensation. The perceived sensation can vary depending on the formulation, nicotine content, flavour ingredients, device characteristics and individual sensitivity.
Because PG is less viscous, it can also influence how easily an e-liquid moves through a device’s wicking material.
These characteristics make PG an important part of the VG PG ratio and the overall formulation strategy.
How Does the Ratio Affect Viscosity?
Viscosity describes how easily a liquid flows. VG has a significantly thicker consistency than PG, so changing their relative proportions changes the physical characteristics of the finished e-liquid.
A higher-VG formulation generally has a thicker consistency. A higher-PG formulation generally produces a thinner liquid.
This distinction matters because vape hardware uses a wick to transport e-liquid toward the heating coil. The wick and coil system need to work effectively with the physical properties of the liquid.
Consequently, the VG PG ratio is an important consideration when developing an e-liquid for a particular type of device.
How Does the Ratio Influence Flavour?
Flavour delivery is another major consideration in e-liquid formulation.
PG is widely used for its ability to carry flavour compounds, making its proportion relevant to flavour expression. VG also contributes to the overall aerosol and mouthfeel, which can influence how flavour is perceived.
A formulation’s flavour profile depends on more than the VG PG ratio. The type and concentration of flavour compounds, nicotine content, coil technology, temperature and airflow can all influence the final sensory characteristics.
The ratio is therefore one component of a much broader formulation process.
How Does VG/PG Ratio Affect Vapour Production?
The proportion of VG and PG can influence the volume and density of aerosol produced by an e-liquid.
VG is commonly associated with larger and denser vapour production, particularly when paired with suitable coil systems and sufficient power. PG produces a lighter aerosol while supporting flavour delivery.
Increasing the VG proportion shifts the formulation toward VG’s physical characteristics. Increasing PG shifts the formulation toward PG’s thinner consistency and flavour-carrying properties.
The VG PG ratio therefore provides useful information about the type of aerosol a formulation is designed to produce.
What Is a 50/50 VG PG Ratio?
A 50/50 VG PG ratio represents an approximately equal balance of vegetable glycerin and propylene glycol.
This type of formulation is widely associated with balanced characteristics. It provides a middle ground between the thicker consistency and aerosol contribution of VG and the thinner consistency and flavour-carrying properties of PG.
Some 50/50 formulations are commonly associated with pod-style and other lower-power vape systems, depending on the specific product and manufacturer’s recommendations.
The suitability of any formulation depends on the design of the hardware being used.
What Does a High-VG Ratio Mean?
A high-VG formulation contains a greater proportion of vegetable glycerin. Ratios such as 70/30 VG/PG are examples of formulations that emphasize VG.
These e-liquids generally have a thicker consistency and are commonly associated with larger aerosol production.
Higher-VG formulations are often developed for devices with coil and wicking systems designed to accommodate thicker liquids. Hardware specifications therefore remain an important part of understanding how a high-VG e-liquid should be used.
What Does a High-PG Ratio Mean?
A higher-PG formulation contains a greater proportion of propylene glycol.
Because PG is thinner than VG, increasing its proportion produces a more fluid e-liquid. Higher-PG formulations also emphasize PG’s flavour-carrying characteristics and associated throat sensation.
These properties can make higher-PG formulations relevant to particular device categories and formulation goals.
The VG PG ratio therefore provides a practical way to describe how the base liquid has been balanced.
Why Does Hardware Compatibility Matter?
E-liquid formulation and vape hardware are closely connected. A device’s coil, wick, airflow and power output all influence how the liquid behaves during operation.
A thicker high-VG e-liquid interacts differently with a wicking system than a thinner high-PG formulation. Manufacturers consider these characteristics when developing both e-liquids and hardware.
Consumers can use the stated VG PG ratio as a reference when reviewing product specifications and manufacturer recommendations.
How Do Flavour Concentrates Fit Into the Formula?
Flavour concentrates are another important part of e-liquid formulation. They provide the specific flavour profile while VG and PG form the primary liquid base.
The concentration and composition of flavour ingredients can affect the final taste and aroma. The VG PG ratio then determines how the flavour formulation is carried within the overall liquid.
Different flavour categories may also be formulated with particular ratios depending on the intended device and sensory characteristics.
Does the VG PG Ratio Affect Every E-Liquid the Same Way?
The effects of a particular ratio can vary because e-liquids contain different flavour systems and are used with different hardware.
A 50/50 VG PG ratio, for example, may behave differently depending on coil design, power level, airflow and wick material.
This is why the ratio should be treated as a formulation specification rather than a complete description of an e-liquid’s performance.
What Should Consumers Look For?
When evaluating e-liquid, the VG PG ratio is one useful specification to examine alongside:
- E-liquid volume
- Flavour profile
- Nicotine strength where applicable
- Manufacturer information
- Recommended hardware
- Storage and handling instructions
Understanding these details provides greater context about how the liquid has been formulated and how it is intended to interact with compatible hardware.
About ABC Vape
ABC Vape is a Canadian online vape shop offering disposable vapes, vape pods, e-liquids, e-juices and vaping accessories. Its product selection includes brands such as Allo, STLTH, Elfbar, Flavor Beast, Insta Bar, Linvo, Orbito, Oxbar and Vice. ABC Vape serves Canadian customers through its online store and offers free delivery on orders above $100.
Conclusion
The VG PG ratio plays a central role in e-liquid formulation because VG and PG have different physical and sensory properties. VG contributes viscosity, aerosol production and a fuller mouthfeel, while PG provides a thinner consistency, flavour-carrying properties and a more noticeable throat sensation.
By adjusting the balance between these two ingredients, manufacturers can formulate e-liquids for different hardware types and intended characteristics. Understanding the VG PG ratio therefore gives consumers useful insight into an e-liquid’s composition, viscosity, flavour delivery, aerosol production and potential hardware compatibility.