There should be a feeding chart on the bag of food that you can use as a starting point. How much you need to feed will vary considerably from one brand to another (and sometimes even from one formula to another of the same brand) based on how many calories per cup the food contains. If you are feeding an All Life Stages food the amounts that are recommended on the bag will have to be modified when feeding a puppy - in general, for an ALS (or adult formula), you double the amount for a puppy from 8 weeks to 3 months, from 3 to 6 months you feed 1.5 times the amount, and from 6 to 11 months you feed 1.25 times the amount.
That said, feed to body condition, not an arbitrary number. You want slow, steady growth ... though they will of course have growth spurts. I don't agree with keeping a puppy on the chubby side. They should be kept lean right from the start. All puppies grow at different rates, so I wouldn't put much stock into the growth charts - they are just averages. As long as the puppy is lean and healthy I wouldn't worry about how they compare to others of the same age. Definitely monitor weight to make sure the puppy is growing at a steady rate and adjust feeding amount up or down based on body condition and digestion - if you start to see loose stools, you are probably overfeeding.
Omen v Wolfstraum
Jasmine Katie v Doolanshaus