A 2-week-old formula-fed baby typically drinks 2 to 3 ounces per feeding, eating 8 to 12 times in a 24-hour period. That works out to roughly 16 to 24 total ounces per day, though the exact amount depends on your baby’s weight and appetite. Babies this age are still building up their intake, so the numbers shift quickly from one week to the next.
How to Calculate Your Baby’s Daily Intake
The simplest way to figure out how much formula your baby needs is by weight. The general guideline is about 2.5 ounces of formula per day for every pound your baby weighs. So if your baby weighs 8 pounds, that’s roughly 20 ounces total across all feedings in a day. A 9-pound baby would need closer to 22 or 23 ounces.
At two weeks, most babies haven’t yet regained their full birth weight (they typically lose some in the first few days of life), so you’re likely working with a weight somewhere between 6 and 9 pounds. That puts the daily total in the range of 15 to 23 ounces for most 2-week-olds. Over the course of the first month, babies gradually increase to 3 to 4 ounces per feeding, eventually reaching around 32 ounces per day. That 32-ounce mark is also the general upper limit: most babies shouldn’t need more than that in a 24-hour period at any point during formula feeding.
Feeding Frequency and Timing
At this age, expect to feed your baby every 2 to 3 hours, including overnight. That usually means 8 to 12 feedings per day. Over the coming weeks, the time between feedings will stretch to every 3 to 4 hours as your baby’s stomach grows and can hold more at once.
To put that stomach size in perspective: by day 10 of life, a newborn’s stomach is about the size of a ping-pong ball, holding roughly 2 ounces. This is why small, frequent feedings are the norm right now. Trying to push larger bottles less often doesn’t match what your baby’s body can comfortably handle yet.
The 2-Week Growth Spurt
If your baby suddenly seems hungrier than usual right around the two-week mark, that’s expected. One of the first major growth spurts happens at 2 to 3 weeks old. During a growth spurt, babies get fussier and want to eat more often, sometimes as frequently as every 30 minutes. This can last a day or two.
If your baby drains a bottle and still seems hungry, it’s fine to offer a little more. You don’t need to rigidly stick to a set ounce amount per feeding. The guidelines are averages, not limits for any single bottle. After the growth spurt passes, your baby’s pattern will usually settle back down.
Reading Your Baby’s Hunger and Fullness Cues
The best way to know whether your baby is eating enough (or too much) at any given feeding is to follow their cues rather than fixating on the number on the bottle.
Early hunger signs include putting hands to mouth, turning their head toward the bottle (called rooting), and smacking or licking their lips. Clenched fists are another signal. Crying is actually a late sign of hunger, so try to catch the earlier cues when your baby is still calm. A baby who’s worked up from crying can have a harder time settling into a feeding.
When your baby is full, you’ll notice them closing their mouth, turning their head away from the bottle, or relaxing their hands. These are clear signals to stop the feeding, even if there’s still formula left. Resist the urge to finish the bottle. Letting your baby decide when they’re done helps them develop healthy eating regulation from the start.
Signs Your Baby Is Getting Enough
Since you can’t measure exactly how much nutrition your baby is absorbing, the best real-world indicators are diapers and weight gain. After the first five days of life, your baby should produce at least 6 wet diapers per day. The number of dirty diapers varies more, but consistent wet diapers are a reliable sign of adequate hydration.
For weight, healthy newborns gain about 1 ounce per day in the first few months. Your pediatrician will track this at checkups, but if you’re concerned between visits, many pediatric offices will let you come in for a quick weight check. Most babies regain their birth weight by around 10 to 14 days old. If your baby hasn’t gotten back to birth weight by the two-week visit, your doctor will likely adjust the feeding plan.
What Underfeeding and Overfeeding Look Like
A baby who isn’t getting enough formula will seem persistently unsatisfied after feedings, produce fewer than 6 wet diapers a day, and gain weight slowly or not at all. Lethargy and a weak cry can also be signs, though these are less common.
Overfeeding is also possible with bottle-fed babies, since formula flows more easily from a bottle than from a breast. Signs include frequent spit-up, gassiness, and fussiness that seems to get worse after feedings rather than better. If your baby consistently finishes a bottle in just a few minutes and then spits up a large amount, you may want to try a slower-flow nipple or pace the feeding by tilting the bottle down periodically to give your baby breaks.
A quick reference for where your 2-week-old likely falls:
- Per feeding: 2 to 3 ounces (60 to 90 mL)
- Number of feedings: 8 to 12 per day
- Daily total: roughly 15 to 24 ounces, depending on weight
- Feeding interval: every 2 to 3 hours
These numbers will climb noticeably over the next two weeks. By the end of the first month, most babies settle into 3 to 4 ounces per feeding every 3 to 4 hours.