A 7-week-old formula-fed baby typically drinks 2 to 4 ounces per feeding, eating 7 to 8 times over 24 hours. That puts most babies in the range of roughly 20 to 28 ounces total per day, though the exact amount depends on your baby’s weight and appetite.
Calculating Your Baby’s Daily Intake
The most reliable way to figure out how much formula your baby needs is by weight. Babies should take in about 2.5 ounces of formula per day for every pound of body weight. So a 9-pound baby would need roughly 22.5 ounces spread across the day, while an 11-pound baby would need closer to 27.5 ounces.
At 7 weeks, most babies weigh somewhere between 8 and 12 pounds, which means daily totals generally fall between 20 and 30 ounces. This is a guide, not a prescription. Some days your baby will eat more, some days less. What matters is the overall pattern across several days, not whether one feeding was smaller than expected.
How Often to Feed
From birth through 3 months, formula-fed babies eat every 2 to 3 hours. That works out to about 7 or 8 feedings per day, including nighttime feeds. At 7 weeks, your baby is still firmly in this stage and will need at least one or two feedings overnight.
Longer stretches of sleep at night (4 to 5 hours) sometimes start appearing around this age, but many babies won’t drop nighttime feedings until 6 or 7 months. If your baby sleeps a longer stretch, there’s no need to wake them for a feeding as long as they’re gaining weight well and making up the volume during the day. If your baby is fussy and it’s been more than 2 hours since the last feeding, hunger is a reasonable first guess.
Reading Your Baby’s Hunger and Fullness Cues
Rather than watching the clock or measuring every ounce precisely, the best approach is to let your baby guide the feeding. Early hunger cues in babies under 5 months include putting hands to their mouth, turning their head toward the bottle, smacking or licking their lips, and clenching their fists. Crying is actually a late sign of hunger, so try to catch the earlier signals when you can.
Fullness looks different. A baby who’s had enough will close their mouth, turn their head away from the bottle, and relax their hands. These are your signal to stop, even if there’s formula left in the bottle. Finishing every last ounce isn’t the goal.
Signs Your Baby Is Getting Enough
Two reliable indicators tell you that feeding is going well: diaper output and weight gain.
After the first week of life, a baby who’s eating enough produces at least 6 wet diapers per day. These should feel noticeably heavy, not just slightly damp. If you’re consistently seeing 6 or more, hydration is on track.
For weight gain, healthy infants in the first few months gain about 1 ounce per day, or roughly 5 to 7 ounces per week. Your pediatrician tracks this on a growth chart at each visit. Steady, consistent growth along your baby’s own curve matters more than hitting a specific number.
How to Tell If You’re Overfeeding
It’s possible to overfeed a formula-fed baby because the flow from a bottle is more consistent than from a breast, and babies sometimes keep sucking for comfort even after they’re full. Overfeeding causes discomfort because the baby’s stomach can’t properly digest that much formula at once. The most common signs are frequent spitting up (more than the usual small amount), gassy and uncomfortable belly, loose stools, and increased fussiness or crying.
If your baby regularly seems uncomfortable after feedings, try offering smaller amounts more frequently rather than larger bottles spaced further apart. Paced bottle feeding, where you hold the bottle more horizontally and pause periodically, can also help your baby recognize fullness before overdoing it. If your baby turns away or closes their mouth, trust that signal rather than encouraging them to finish the bottle.
What a Typical Day Looks Like
For a 10-pound baby at 7 weeks, a day might look something like this: 3 to 4 ounces per bottle, offered every 2.5 to 3 hours during the day and once or twice overnight, for a total of about 25 ounces across 7 or 8 feedings. Some feedings will be 2.5 ounces, others might be 4. That variation is completely normal.
As your baby grows over the coming weeks, the amount per bottle will gradually increase while the number of feedings per day slowly decreases. By 3 to 4 months, many babies shift to 4 to 6 ounces per bottle with slightly longer gaps between feedings. You don’t need to plan this transition. It happens naturally as your baby’s stomach capacity grows and they start sleeping longer stretches at night.