Understanding the 'Peg'
The term 'peg' is a unit of volume, primarily used in the Indian subcontinent, to measure amounts of liquor. Unlike a universal standard, a 'peg' can refer to different volumes, with the most common sizes being the 'small peg' and the 'large peg.' The total alcohol content in one peg of whiskey is a direct calculation of the volume of the peg multiplied by the whiskey's alcohol by volume (ABV).
Breaking Down the Sizes
- Small Peg (Chota Peg): Generally measures 30ml. For a whiskey with a standard 40% ABV, a small peg contains approximately 12ml of pure alcohol (30ml x 0.40 = 12ml). This is roughly equivalent to a U.S. standard drink in terms of alcohol content, though the volumes differ.
- Large Peg (Bara Peg): Typically measures 60ml. With a 40% ABV whiskey, a large peg contains about 24ml of pure alcohol (60ml x 0.40 = 24ml). This is double the alcohol of a small peg and represents a significant portion of the daily recommended limit for alcohol consumption.
- Other Pegs: There are less common, but regionally recognized, measures such as the Patiala peg, which is a much larger 120ml serving.
The Importance of Alcohol by Volume (ABV)
The amount of alcohol in a peg is not static; it changes with the ABV of the whiskey. While 40% ABV is the industry standard for many whiskies, others can have a higher concentration. Cask-strength whiskies, for instance, are bottled at a higher ABV, sometimes exceeding 60%. This means a peg of cask-strength whiskey will have considerably more pure alcohol than a standard 40% ABV whiskey of the same volume. Always check the bottle's label for the exact ABV to calculate the precise alcohol content.
A Note on Responsible Drinking
Being aware of the alcohol content in your drink is a critical part of responsible consumption. Knowing whether you are having a small or large peg can make a substantial difference in your overall alcohol intake. This knowledge is especially important when mixing drinks or consuming at home, where pour sizes are often less controlled than in a commercial bar setting.
Peg vs. Shot: A Comparative Analysis
The terms 'peg' and 'shot' are often used interchangeably but have different standard volumes, which affects the total alcohol consumed. The following table compares common measurements to help clarify the differences.
| Measurement | Typical Volume (ml) | Pure Alcohol (ml) @ 40% ABV | 
|---|---|---|
| Small Peg | 30 | 12 | 
| Large Peg | 60 | 24 | 
| Standard U.S. Shot | 44 (1.5 fl oz) | 17.7 | 
| Standard U.K. Shot | 25 | 10 | 
| Double U.K. Shot | 50 | 20 | 
This table demonstrates that a large peg has more pure alcohol than a standard U.S. shot and significantly more than a standard U.K. shot. The differences highlight why understanding local measurements is essential for tracking alcohol intake accurately.
Conclusion
The alcohol in one peg of whiskey varies depending on the specific volume of the peg and the ABV of the whiskey itself. By understanding that a 'small peg' is typically 30ml and a 'large peg' is 60ml, and that most whiskies are 40% ABV, you can easily calculate the pure alcohol content. This knowledge is key for anyone looking to monitor their alcohol consumption and practice responsible drinking habits.
Factors Affecting Alcohol Content and Absorption
Several factors can influence how the alcohol from a peg of whiskey affects an individual, beyond the simple measure of pure alcohol. This includes body weight, metabolism, how quickly the drink is consumed, and whether it's paired with food. For instance, a person who drinks a large peg on an empty stomach will likely feel the effects of the alcohol more quickly and intensely than someone who sips a small peg with a meal.
Cask Strength vs. Standard Bottling
As mentioned earlier, ABV has a significant impact. Cask-strength whiskies offer a more intense flavor profile but also a much higher alcohol load. For those not used to such potency, it's a good practice to dilute cask-strength whiskies with water to both enhance the flavor and control the alcohol intake. The final alcohol content in your glass is ultimately up to you when starting with a higher-proof spirit.
Mixing and Cocktails
When a peg of whiskey is used in a cocktail, the overall alcohol volume of the finished drink is also important. Some cocktails may contain multiple pegs or larger pours, so a simple count of one peg doesn't always reflect the total alcohol consumed. Always be mindful of the ingredients and volumes when enjoying mixed drinks to stay within safe consumption limits.
For more information on alcohol measurement and responsible consumption, visit the Drinkaware website.