What is the amount of alcohol and 1 ounce shot 80 proof whiskey?

Here's how to calculate the amount of alcohol in a 1-ounce shot of 80-proof whiskey:

* Proof: Proof is twice the percentage of alcohol by volume. So, 80 proof whiskey is 40% alcohol by volume.

* Calculation:

* 1 ounce (shot) x 0.40 (alcohol percentage) = 0.4 ounces of alcohol

Therefore, a 1-ounce shot of 80-proof whiskey contains 0.4 ounces of alcohol.