My baby is 3weeks old now. How much formula milk is enough for her? She is drinking 80-90ml formula milk every 2-3hrs, is it too much for her?

Eh, actually its 150ml x (body weight in kg) - this will be the approx amount of fm that baby takes in a 24 hr period. F u giving bm or latching then this figure needs to be adjusted. There is a growth spout about 2-3 weeks old and at 4-6 weeks old - during such time, baby may drink and sleep in an unusually pattern - some babies will drink more, some will sleep more. Just make sure that when baby cries, its not because of diaper or colic or wind in stomach. Also don't force feed baby - then all is good

On average, a newborn drinks about 45-90 ml every 2-3 hours. This amount increases as your baby grows and is able to take more at each feeding. At about 2 months, your baby may be taking 120-150 ml at each feeding and the feedings may be every 3-4 hours.

Hi... you might find this article informative https://sg.theasianparent.com/gauging-how-much-formula-your-baby-needs

You can take her body weight x 80ml divided by 6 to calculate for the standard amount a baby should have.