At 11 weeks old, most formula-fed babies eat about 4 to 5 ounces per feeding, totaling roughly 24 to 32 ounces across the day. Breastfed babies at this age typically nurse 8 to 10 times in 24 hours. The exact amount varies from baby to baby, and the most reliable guide is your infant’s own hunger and fullness cues rather than a rigid schedule.
Formula-Fed Babies at 11 Weeks
Eleven weeks falls right between the second and third month, a period when feeding volumes shift noticeably. During the second month, most babies take 2 to 4 ounces every 2 to 4 hours across 7 to 8 feedings per day. By the third month, that typically increases to 4 to 5 ounces every 4 to 5 hours, with 6 to 8 feedings per day. At 11 weeks, your baby is likely somewhere in the middle of that transition.
A reasonable daily total for most formula-fed babies this age is 24 to 32 ounces. Babies receiving about 32 ounces or more each day generally don’t need additional vitamin D supplementation, since formula is already fortified. If your baby consistently finishes bottles quickly and still seems hungry, it’s fine to offer an extra ounce. If they regularly leave formula behind, scale back slightly. The goal is to follow your baby’s lead rather than push toward a specific number.
Breastfed Babies at 11 Weeks
Breastfeeding looks different because you can’t measure ounces at the breast. The CDC recommends feeding exclusively breastfed babies every 2 to 4 hours, which works out to about 8 to 12 sessions in 24 hours. At 11 weeks, most breastfed babies have settled closer to 8 to 10 feedings per day as they become more efficient at the breast.
Some sessions will be long, others surprisingly short. That’s normal. Babies regulate their own intake at the breast, taking what they need and stopping when full. Breast milk composition also changes during a single feeding, becoming fattier toward the end, so letting your baby finish one side before switching gives them access to that higher-calorie milk.
If you’re pumping and bottle-feeding breast milk, the volumes tend to be lower per feeding than formula because breast milk is digested more quickly. Most breastfed babies take roughly 3 to 4 ounces per bottle, though individual variation is wide.
How to Tell Your Baby Is Hungry
Crying is actually a late hunger signal, a sign of distress rather than the first indication your baby wants to eat. Earlier, more reliable cues include fists moving to the mouth, head turning as if searching for the breast, increased alertness and activity, sucking on hands, lip smacking, and opening and closing the mouth. Catching these early signs makes feedings calmer for both of you.
Fullness cues are equally important. A satisfied baby will pull away from the breast or bottle, turn their head away from the nipple, relax their body, and open their fists. If your baby shows these signs, the feeding is done even if the bottle isn’t empty. Pushing a baby to finish a bottle can override their natural ability to self-regulate, which they’re quite good at this age.
Feeding Frequency and Spacing
Most 11-week-olds eat every 3 to 4 hours during the day. The American Academy of Pediatrics recommends responsive feeding, meaning you feed your baby whenever they show hunger cues rather than watching the clock. Some babies cluster their feedings in the evening, taking in several smaller meals close together before a longer stretch of sleep. This is completely normal and not a sign of low milk supply.
At night, babies between birth and 3 months tend to wake and feed in roughly the same pattern as during the day. But many babies start settling into longer overnight stretches right around this age. A continuous 4 to 5 hour block of sleep at night becomes more common by the end of the third month. That doesn’t mean you should withhold feedings to encourage this. It happens naturally as your baby’s stomach grows and their sleep cycles mature.
Stomach Size at This Age
Between 1 and 3 months, a baby’s stomach holds about 4 to 6 ounces. This physical limit is one reason babies eat small amounts frequently rather than taking in large volumes at once. Overfeeding past what the stomach can comfortably hold often leads to spitting up, fussiness, or visible discomfort. If your baby routinely spits up large amounts after eating, smaller and more frequent feedings may help.
Signs Your Baby Is Getting Enough
The clearest indicator that feeding is going well is steady weight gain. At this age, babies typically gain about 1.5 to 2 pounds per month, or roughly 5 to 7 ounces per week. Your pediatrician tracks this on a growth chart, and what matters most is that your baby follows a consistent curve rather than hitting a specific percentile.
Between weigh-ins, you can check for adequate intake at home. A well-fed baby produces at least 6 wet diapers a day, seems content between feedings, is alert and active during awake periods, and has good skin color and muscle tone. If your baby is consistently fussy after feedings, producing fewer wet diapers than usual, or not gaining weight, those are worth bringing up at your next visit.
Growth Spurts and Temporary Changes
Around 3 months, many babies go through a growth spurt that temporarily increases their appetite. You may notice your baby wanting to eat more often, seeming hungrier than usual, or nursing for longer sessions. This can last a few days to a week. For breastfeeding parents, the increased demand signals your body to produce more milk, so feeding on demand during these stretches is the most effective response. For formula-fed babies, offering an extra ounce per bottle or an additional feeding during the day typically satisfies the increased need. Once the spurt passes, your baby’s intake usually levels back to their normal pattern.