Question: how many cups is 12 oz of coffee grounds?
Answer: First off, let's assume there's zero wastage. So your 12 ounces of whole beans will be ground into 12 ounces of ground coffee. Simple divide the 12 ounces by 0.54 ounces per cup… and you get 22 cups. And that means, if you have two cups a day, your 12-ounce bag of whole beans will last you 11 days.