A proof of 190 translates to 95 percent alcohol content. That's more than most rubbing alcohol. Many of Maryland's college presidents requested the ban to help curb student drinking problems.

A proof of 190 translates to 95 percent alcohol content. That’s more than most rubbing alcohol. Many of Maryland’s college presidents requested the ban to help curb student drinking problems.

A proof of 190 translates to 95 percent alcohol content. That's more than most rubbing alcohol. Many of Maryland's college presidents requested the ban to help curb student drinking problems.

Whiskey can weigh in from 40% to 50% ABV or 80 to 100 proof. Tequila also ranges from 40% to 55% ABV and 80 to 110 proof and vodka runs 40% to 90% ABV, so 80 to 180 proof.

It's important to note that in the U.S., proof doesn't equal alcohol by volume. Let's say the vodka you pick off the shelf says "80 proof" on the front -- that doesn't mean that it has an ABV of 80%.

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A proof of 190 translates to 95 percent alcohol content. That’s more than most rubbing alcohol. Many of Maryland’s college presidents requested the ban to help curb student drinking problems.