How much formula might your baby drink?

A common guide is about 150 ml of formula per kilo of body weight each day (roughly 2.5 oz per pound), for babies under 6 months who aren’t yet on solids. So a 5 kg baby needs around 750 ml a day. Every baby is different: some want a little more, some less.

Most babies settle around 150–200 ml/kg and rarely need more than about 1 liter (32 oz) a day from formula. If your baby seems hungry beyond that, talk to your pediatrician about amounts that suit your baby.

Breastfed babies feed on demand, and you can’t easily measure ounces at the breast, so this calculator isn’t meant for them. Watch your baby’s cues and wet diapers instead of a target number.

Weight gain, diaper counts and feeding behavior help your care team assess intake. Our newborn wet diaper guide explains the first-week pattern. These estimates cannot tell you whether an individual baby is getting enough; ask your pediatrician if you are concerned.

The calculator gives an estimate. A feeding log records what your baby actually drank. Plumi’s free baby feeding tracker logs nursing, bottles and solids in one tap and totals the day for you. You can also keep a separate count in the wet and dirty diaper tracker.