How much does your LO drink a day?

My LO is 8 weeks old, drinks 3.5oz per feeding, feeds roughly every 3 hours amounting to 7 feeds a day, sleeps long stretches at night (4-4.5hours).

She started off direct feeding for 3 weeks, wasnt gaining weight appropriately, switched to bottle feeding & supplement with formula. For a week now she’s been bottle feeding with EBM, stopped supplementing with formula. She drinks about 20-23oz a day.

From the very beginning, i never know how much milk she requires a day. Are the calculations for BM the same as the calculation for formula? Theres only been one day where she consumed 24oz.. averagely its 20-23. She was born with low birth weight and she’s only 3.5kg as of today. If i calculate 2.5oz x baby weight in pounds, she only needs about 18oz

Her output is good and she gained 700g in 3 weeks, so i’m really not worried. I just find that theres a lot of confusion about how much and how often babies should drink. My baby was born 2.1kg and she used to take like 15-17oz a day. I felt like a failure at the time because she wasn’t taking 24oz, but its actually ridiculous to expect a 2.1kg baby to take in the same as a 3kg+ baby.. Ever since, i just go off the weight.

My doctor said to just feed ‘on demand’, well.. since i started bottle feeding, i no longer feed on demand so as not to overfeed her. Sometimes she’s cranky bc of gas, sometimes she’s cranky bc she’s overtired. Every time she cries, people would tell me to just give her milk even though she just finished a feed..I hold her for a few minutes and she falls asleep for 1-2 hours.. I dont wake her up to feed anymore, and im not super strict about feeding after exactly 3 hours.. if she happens to wake up 30 minutes before her next feed and she’s crying and hungry, i’ll feed her.

Anyways, just curious how much everyone’s LO are drinking? are there anyone who haven’t reached the 24oz yet? 🥶