How many cups is in 45

You're asking how many cups are in 45 *what*. You need to tell me what you're measuring!

For example:

* 45 ounces: There are approximately 5.63 cups in 45 ounces.

* 45 milliliters: There are approximately 0.19 cups in 45 milliliters.

* 45 grams of flour: There are approximately 1.5 cups of flour in 45 grams.

Please provide the unit of measurement so I can give you a precise answer.