How Much Should a Newborn Eat? A Guide to Feeding in the First Weeks

The first few days: colostrum and tiny amounts

In the first day or two of life, a newborn's stomach holds only about a teaspoon's worth. Colostrum — the first breast milk — is concentrated and produced in small amounts that are well matched to this capacity. This is by design: frequent, small feeds signal the body to increase milk production over the coming days.

Formula-fed newborns in the first days of life also take small amounts — often half an ounce to an ounce per feed early on, increasing over the first week. The AAP notes that breastfed newborns typically start at about 1 ounce per feed, gradually increasing 1Ref 1American Academy of Pediatrics (HealthyChildren.org) (2023).How Often and How Much Should Your Baby Eat?.Feeding frequency (8–12 times per 24 hours), formula amounts in the first month (2–3 oz, increasing to 3–4 oz), hunger cues, and diaper output as indicators of adequate intake. The baby's feeding team (pediatric provider, lactation consultant if breastfeeding) will guide how this should look for a specific baby.

Feeding frequency in the first weeks

Newborns generally need to feed 8 to 12 times in 24 hours — roughly every two to three hours 1Ref 1American Academy of Pediatrics (HealthyChildren.org) (2023).How Often and How Much Should Your Baby Eat?.Feeding frequency (8–12 times per 24 hours), formula amounts in the first month (2–3 oz, increasing to 3–4 oz), hunger cues, and diaper output as indicators of adequate intake. This includes nighttime feeds; newborns do not yet have the ability to sleep through a feeding interval.

For breastfed babies, feeding on demand — responding to hunger cues rather than strictly watching the clock — supports milk supply and the baby's natural rhythm. However, if a baby is very sleepy (common in the first days), waking them to feed every two to three hours during the day is often recommended until they are back to birth weight and feeding is well established.

For formula-fed babies, the AAP suggests starting with about 2 ounces every 2 to 3 hours in the first month, gradually increasing to 3 to 4 ounces by one month of age 1Ref 1American Academy of Pediatrics (HealthyChildren.org) (2023).How Often and How Much Should Your Baby Eat?.Feeding frequency (8–12 times per 24 hours), formula amounts in the first month (2–3 oz, increasing to 3–4 oz), hunger cues, and diaper output as indicators of adequate intake. However, individual babies vary, and letting a baby's hunger and fullness cues guide amounts is generally encouraged.

How to read hunger cues

Crying is a late hunger signal. By the time a baby is crying, they are already quite hungry and may be harder to latch or feed calmly. Earlier cues include 1Ref 1American Academy of Pediatrics (HealthyChildren.org) (2023).How Often and How Much Should Your Baby Eat?.Feeding frequency (8–12 times per 24 hours), formula amounts in the first month (2–3 oz, increasing to 3–4 oz), hunger cues, and diaper output as indicators of adequate intake:

• Rooting: turning the head side to side, opening the mouth, moving lips
• Hand-to-mouth movements: bringing hands to the mouth
• Sucking motions: mouthing, sticking out the tongue
• Increased alertness or squirming

Learning to recognize these early signals helps feeding go more smoothly. Fullness cues include turning away from the breast or bottle, releasing the nipple, becoming relaxed and drowsy, or simply slowing and stopping.

How to know if a baby is eating enough

Because breastfed babies are not measured in ounces, parents often worry about whether intake is sufficient. Reassuring signs include:

• Wet and soiled diapers: by day four or five, most babies have at least five to six wet diapers in 24 hours 1Ref 1American Academy of Pediatrics (HealthyChildren.org) (2023).How Often and How Much Should Your Baby Eat?.Feeding frequency (8–12 times per 24 hours), formula amounts in the first month (2–3 oz, increasing to 3–4 oz), hunger cues, and diaper output as indicators of adequate intake. Stools transition from dark meconium to yellowish or seedy stools in breastfed babies.
• Weight: it is normal for newborns to lose up to about 7 percent of their birth weight in the first few days 2Ref 2Flaherman VJ, Schaefer EW, Kuzniewicz MW, et al. (2015).Early Weight Loss Nomograms for Exclusively Breastfed Newborns.Normal postbirth weight loss of up to 7–10% in breastfed newborns, with expected return to birth weight by 10–14 days. They are generally expected to be back at birth weight by around 10 to 14 days and then gain steadily — typically around an ounce per day in the first few months. The provider will track this at well-child visits.
• Contentment after feeds: a baby who seems satisfied, alert between feeds, and has appropriate diaper output is generally getting enough.

Feeding concerns should always be discussed with a pediatric provider or lactation consultant, who can observe a feeding and offer specific guidance.

Breastfeeding and formula together

Some families use a combination of breastfeeding and formula, sometimes called combination or supplemental feeding. This can work well for many families. It is most helpful to discuss timing and amounts with a lactation consultant or provider to support milk supply while meeting the baby's needs. In some situations — low milk supply, latch difficulty, hospital supplementation after birth — formula plays an important bridging role while breastfeeding is established or supported.