How much coffee grounds to make 90 cups of coffee?

Explanations:

Each cup of coffee requires two rounded teaspoons or about 10.5 grams of ground coffee. So for 90 cups of coffee you will require (2 x 10.5) x 90 grams of coffee, or around 1900 grams. If you buy coffee in a standard bag of 227g, you will require nine bags of coffee. Each bag will yield 25 cups, so 9 bags = 225 cups of coffee.