Complete Baby Feeding Guide by Month (Newborn to 1 Year)

Last updated: 2026-06-25

The basic formula rule: 150 ml per kg of body weight

The most widely used starting point for formula feeding is "about 150 ml per kg of body weight per day." Babies under 6 months are considered to need about 150 ml of formula (roughly a 120-180 ml range) for each kilogram of body weight per day. For example, a 4 kg baby needs 4 × 150 = 600 ml a day, and a 5 kg baby needs 750 ml. However, total formula is recommended to stay under about 960 ml (about 32 oz) a day, because too much formula can lead to nutritional imbalance or stomach strain.

Dividing this daily total by the number of feedings per day gives the per-feeding amount. The same 600 ml is about 75 ml per feeding over 8 feedings, or about 100 ml over 6. If doing the math yourself is a hassle, enter weight, age, and number of feedings into the baby formula calculator to see the daily and per-feeding amount right away.

Why the feeding interval keeps getting longer

A newborn's stomach is very small and can only hold a little at a time, so they need to feed often, at short intervals. As they grow and the stomach enlarges, they take more per feeding and the interval naturally widens. The usual flow is feeding every 2-3 hours, 8-12 times a day as a newborn, then 3-4 hour intervals at 3-6 months, and around 4 hours once solids begin after 6 months.

Especially in the newborn period, on-demand feeding based on hunger cues is recommended over clock-based feeding. Mouthing, sucking on hands, and turning the head from side to side looking for food (the rooting reflex) are hunger signs. Crying is a late hunger cue, so catching it earlier makes feeding easier. To estimate the next feeding time by adding the recommended interval to your last feeding time, use the feeding interval calculator.

Formula amount and feeding interval summary table by month

These figures are averages, not absolute answers. Even at the same age, the right amount varies with birth weight, growth pace, and whether the baby is breastfed, formula-fed, or mixed. Use the table as a "starting point" and adjust to your baby's response.

Signs your baby is feeding well: weight and diapers

Whether your baby is feeding enough is better confirmed by "outcome indicators" than by the formula number. The two most important are weight gain and diaper output. Newborns lose a little weight in the first days, then usually regain their birth weight around 10-14 days of age and gain steadily after that. If there are at least 6 wet diapers a day, regular stools, and the baby is satisfied after feeding and sleeps well, these are generally signs of feeding well.

To see how your baby's height and weight compare with peers, the infant growth percentile calculator shows percentiles based on the WHO Child Growth Standards. Still, the "trend" of growing steadily along the same curve matters far more than a single number. If the percentile drops or rises sharply over a short period, a pediatrician check is recommended.

The switch to solids and reducing formula

Solids usually start around 6 months. The right time is when the baby can hold up its head well, sit with support, shows interest in food, and the reflex of pushing food out with the tongue (tongue-thrust reflex) is fading. Start with a small amount of a single ingredient such as rice cereal, adding a new ingredient every few days while watching for allergic reactions.

Even after solids begin, formula or breast milk is still the main source of nutrition around 6 months. So do not cut formula sharply just because solids have started; reduce the number and size of feedings naturally as solid intake grows. After 12 months, you can consider switching to whole milk and regular meals, with about 2-3 servings of milk a day plus three meals as the baseline.

Common worries and how to handle them

• Eats less than the recommended amount: babies often make up at the next feeding for eating less at one. Watch the daily total and weight trend. If appetite keeps dropping, see a pediatrician.
• Spits up often after feeding: infant reflux is common. Burp thoroughly after feeding and avoid feeding too much at once. See a doctor if weight is not gaining or vomiting is severe.
• When to drop night feedings: usually they decrease naturally after 4-6 months once weight gains enough and the baby sleeps longer at night. The timing varies, so do not force it.
• Refuses formula: check the bottle and nipple type, formula temperature, and feeding position, and consult a pediatrician if it continues.

This article is for general medical and parenting reference and does not replace diagnosis, treatment, or professional advice. Consult a pediatrician for decisions about your baby's formula, feeding, solids, and health.

Last updated: 2026-06-25