It is a matter of taste but I use 1 tablespoon per cup.

A tablespoon of coffee weighs approx 14 grams.

1 pound weighs approx 454 grams.

454/14 = approx 32 teaspoons per pound or 32 cups.

If 20% get refills you will need 120 teaspoons or 3.75 or better yet 4 pounds of coffee (just in case 20% was low).

Note all weights are US and all are approximate.

A tablespoon of coffee weighs approx 14 grams.

1 pound weighs approx 454 grams.

454/14 = approx 32 teaspoons per pound or 32 cups.

If 20% get refills you will need 120 teaspoons or 3.75 or better yet 4 pounds of coffee (just in case 20% was low).

Note all weights are US and all are approximate.