A 5-day-old baby typically takes in 1 to 2 ounces per feeding, eating 8 to 12 times over a 24-hour period. That works out to roughly every 2 to 3 hours around the clock. Whether you’re breastfeeding, formula feeding, or doing a combination, your baby’s stomach is still tiny at this age, so small, frequent meals are exactly what’s expected.
Formula Feeding Amounts at 5 Days
If your baby is drinking formula, offer 1 to 2 ounces per feeding every 2 to 3 hours. Most formula-fed newborns eat 8 to 12 times in 24 hours, which means you can expect to prepare a bottle roughly every 2 to 3 hours, including overnight. Some feedings your baby may drain the full 2 ounces; other times they may only take an ounce. Both are normal.
If your baby consistently finishes the bottle and still seems hungry, it’s fine to offer a little more. Let their hunger cues guide you rather than sticking rigidly to a number. Babies are good at regulating their own intake at this stage, and overfeeding with a bottle is more common than underfeeding. Pacing the feeding (holding the bottle more horizontally and pausing occasionally) gives your baby time to recognize when they’re full.
Breastfeeding Frequency and Duration
Breastfed babies also eat 8 to 12 times per day, sometimes more. At 5 days old, you should be nursing roughly every 2 to 3 hours. You won’t be able to measure ounces the way you can with a bottle, which is completely normal. By this point in the first week, a breastfed baby takes in about 1 to 2 ounces per session, though that varies from feeding to feeding.
Session length varies too. Some feedings are long and leisurely, others are quick. What matters is that your baby is latching well, you can hear or see swallowing, and they seem satisfied when they pull off. There’s no set number of minutes per side that every baby needs.
Cluster Feeding Is Normal Right Now
Around day 4 or 5, many babies start cluster feeding, meaning they want to eat several times in quick succession, sometimes every hour, often in the evening. This can feel alarming if you’re wondering whether your baby is getting enough, but it’s a normal pattern driven by a few things: your baby’s stomach is still very small, your milk supply is still calibrating to demand, and prolactin (the hormone that drives milk production) naturally dips later in the day.
Cluster feeding around the clock is common in the first few days of life. By day 5, though, you should generally see feeds spacing out to every 2 to 3 hours during most of the day. If your baby is feeding constantly throughout the entire day and night without ever seeming satisfied, that can be a sign they aren’t getting enough at each feeding and may need a latch evaluation or feeding assessment.
How to Tell Your Baby Is Getting Enough
Since you can’t measure what goes in during breastfeeding, diapers are your best indicator. By day 5, your baby should produce at least 6 wet diapers per day. The number of dirty diapers varies, but you should see some. Urine should be pale or clear, not dark or concentrated.
Hunger cues to watch for include hands moving to the mouth, head turning toward the breast or bottle (called rooting), lip smacking or licking, and clenched fists. Crying is actually a late hunger sign. If you wait until your baby is crying hard, they may be too worked up to latch well, so try to catch those earlier signals.
When your baby is full, they’ll close their mouth, turn away from the breast or bottle, and relax their hands. These are signs to stop, not push more milk.
Weight Loss in the First Week
Almost all newborns lose weight in the first few days after birth. Breastfed babies lose an average of about 6.6% of their birth weight before they start gaining, with weight gain typically beginning around day 2 or 3. By 5 days old, most babies have hit their lowest weight and are starting to climb back up.
A loss of up to about 7% is typical. A loss of 10% or more is a red flag that can signal dehydration and usually prompts a healthcare provider to evaluate feeding and possibly recommend supplementation. Your baby’s weight was likely checked before hospital discharge and will be checked again at the first pediatric visit, which usually happens within a few days of going home.
Signs of Dehydration to Watch For
At 5 days old, dehydration is the main risk of underfeeding. Signs include a sunken soft spot on top of the head, sunken eyes, few or no tears when crying, fewer than 6 wet diapers per day, and unusual drowsiness or irritability. A baby who is very difficult to wake for feedings or seems unusually floppy or lethargic needs prompt medical attention. If you notice the soft spot on your baby’s head looking noticeably dipped inward, that warrants an urgent call to your pediatrician or a visit to urgent care.
Most healthy newborns who are feeding 8 to 12 times a day and producing plenty of wet diapers are getting exactly what they need. The amounts feel tiny, but so is your baby’s stomach, and those small, frequent feedings add up.