Free Pregnancy Tool
Infant Feeding Volume
Enter your baby's weight and how many feeds a day. We estimate milk per day and per bottle, for formula or expressed milk.
General information only, not medical advice. Ask your doctor or midwife.
How this works
Formula: Daily milk ≈ 150 mL per kg (about 2.5 oz per lb), up to about 32 oz (950 mL). Per feed = daily ÷ feeds per day.
- A common rule of thumb is about 150 mL of milk per kg of body weight per day, or 2.5 oz per pound.
- Most babies do not need more than about 32 oz (950 mL) a day, so the estimate stops there.
- Divide by the number of feeds to get a rough bottle size.
- In the first days after birth babies take much smaller amounts. Breastfed babies feed on cue, so this is mainly for bottles.
Everything is worked out in your browser. Belly Weekly does not send or store your answers.
Questions
How do I know my baby is getting enough?
Steady weight gain, plenty of wet diapers and a content baby after feeds are good signs. Your doctor checks growth at visits.
Should I make my baby finish the bottle?
No. Follow your baby's cues. Some feeds will be bigger than others.
Does this change after 6 months?
Once solids start, milk is still important, but the amount often levels off. Ask your doctor about your baby.