How many milligrams are in a cup of coffee?
One cup of brewed coffee (8 oz) contains about 70–140 mg of caffeine, or about 95 mg on average
A cup of coffee has a mass of around 237 grams, or 237 thousand milligrams. However, I assume you actually wanted to know how many milligrams of caffeine are in a cup of coffee. The answer, according to the USDA, is 95 milligrams.
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