An average shot of distilled spirits, such as whiskey, vodka, rum, or tequila, typically contains 40% alcohol by volume (ABV). This level of alcohol content is often referred to as 80 proof. It means that 40% of the liquid in the shot is pure alcohol, and the remaining 60% is water and other components.
It's important to note that the alcohol content can vary depending on the specific brand or type of spirit. Some liquors may have a slightly higher or lower ABV, but 40% is the most common standard for a standard shot in many countries. Always drink responsibly and be aware of the alcohol content in the beverages you consume.