When 3/4 of a cup is doubled, the result are 1 1/2 cups. When adding like fractions, the bottom number, the denominator, remains the same. In this case, it is four. The top numbers, or numerators, are added.
https://www.reference.com/food/many-coffee-beans-cup-coffee-bb3c526e86e20c96
There are two coffee beans within every coffee berry, and approximately 40 grams of coffee berries are needed for the 8 ounces of ground coffee used to make a single cup. The beans are hulled and roasted before use, reducing moisture and further decreasing the coffee's weight.
https://www.reference.com/food/many-coffee-beans-cup-coffee-bb3c526e86e20c96
In fact, eating coffee beans provides you with much more caffeine than drinking coffee. In comparison with the 95 milligrams in 1 cup of brewed coffee, a 28-bean serving of dark chocolate-covered coffee beans contains 336 milligrams of caffeine.
http://www.livestrong.com/article/536440-much-energy-can-eating-coffee-beans/
How much is too much? Up to 400 milligrams (mg) of caffeine a day appears to be safe for most healthy adults. That's roughly the amount of caffeine in four cups of brewed coffee, 10 cans of cola or two energy shot drinks. Although caffeine use may be safe for adults, it's not a good idea for children. And adolescents should limit themselves to no more than 100 mg of caffeine a day.
http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/caffeine/art-20045678
It takes approximately 70 coffee beans to brew a single cup of coffee according to Upscale Coffee. This number of beans produces approximately 8 grams of coffee.
https://www.reference.com/food/many-coffee-beans-cup-coffee-bb3c526e86e20c96
There is 1 cup of milk in a half pint. There are 2 cups of milk in a pint and 2 pints in a quart. There are 4 quarts of milk in a gallon.
https://www.reference.com/food/many-coffee-beans-cup-coffee-bb3c526e86e20c96
But coffee beans are high in caffeine, which can make you feel more energetic. Although there is no way to measure this subjective feeling, you need to eat approximately 4 to 6 tablespoons of coffee beans before you feel the energizing effects of caffeine.
http://www.livestrong.com/article/536440-much-energy-can-eating-coffee-beans/
OK, I am a chemist and here is my take on the question. There is only so much caffiene per bean. If there is 5 milligrams of caffiene/bean and you eat 30 beans or make espresso with 30 beans, the most caffiene you can get is 150 milligrams of caffiene. Caffiene is a very easy to extract compound, it goes into water very readily.
http://www.coffeeforums.com/forum/coffee-beans-espresso-beans/2721-chocolate-covered-espresso-beans-how-much-caffeine.html
Under this theory, eating one bean would have to put more caffeine in your body then brewing a cup of coffee with one bean ground up in the coffee maker. The only question then is how many beans must be ground up and brewed to equal one bean eaten.
http://www.coffeeforums.com/forum/coffee-beans-espresso-beans/2721-chocolate-covered-espresso-beans-how-much-caffeine.html
One ounce of highly concentrated coffee beans in the form of an espresso provides only 3 calories. As calories are the major measurement of the amount of energy in a food, coffee beans give you very little energy. Adding chocolate in the form of dark chocolate-covered coffee beans, however, gives you a lot of energy, with 216 calories in a 28-bean serving.
http://www.livestrong.com/article/536440-much-energy-can-eating-coffee-beans/
how many coffee beans can i eat a day?
I can eat 100 mg of coffee beans a day. You can eat 100 milligrams of coffee beans a day.