One cup heavy cream makes how many cups when whipped?

You can't really say how many cups of whipped cream you'll get from one cup of heavy cream because:

* Whipped cream is air incorporated into cream. The more air you whip in, the more volume you get.

* The consistency matters. Do you want stiff peaks, soft peaks, or something in between? Each consistency will have a different volume.

However, a good rule of thumb is that 1 cup of heavy cream will typically yield about 2-3 cups of whipped cream.

Keep in mind that this is an approximation and the actual amount may vary depending on the factors mentioned above.