My son is 6 weeks and he drinks about 24-30 oz a day
3.5 oz
Approximately 3oz per feed every 3 hours or so
My daughter drinks about 2.5-3 oz every three hours. Babies need 2.5 ounces for their weight ie 8lbs 8oz- 8.5 multiply that by 2.5 and you get 21.25 and it’s up to you whether you make it 21oz or try and get them to take 22oz
Honestly I don’t add it up but he does drink 3-4 oz every 2-3 hours during the day and then prolly once or twice during the night(whenever he wakes up for it)