How many milliliters is a peg of whiskey?

There's no standard measurement for a "peg" of whiskey. It's a very informal term that can vary greatly depending on the location and the individual serving it.

Here's why it's difficult to give a precise answer:

* Regional Variations: "Peg" can mean different things in different parts of the world. In some places, it might be a small measure, while in others, it might be a larger pour.

* Personal Preference: Even within the same bar or pub, the amount of whiskey in a "peg" can vary depending on the bartender and the customer's preference.

Instead of "peg", consider using more specific measures:

* Standard Drink (US): 1.5 ounces (44.36 ml)

* Double: 3 ounces (88.72 ml)

* Shot: 1.5 ounces (44.36 ml)

If you're unsure, it's always best to ask your bartender for clarification!