Everything you need to know about making bottle is on the milk can .
Every 2 oz of water is 1 scoop of formula so if you giving him 4 scoops of formula then there should be 8 oz of water
Every scoop gets 2oz of water.
I agree with @ashley4beauties. My daughter is eating 7 oz and she gets 3 scoops of milk.
For every two ounsez its one scoop of milk