How many ounces should a newborn eat?

The big chart everyone wants exists. We'll give you the chart. But the more useful answer is "watch your baby." Numbers are a starting point. Babies don't read them. Here's what to expect by age, plus the simple weight-based math, and the cues that matter.

The feeding chart by age

This is what most newborns eat in the first 8 weeks. Your baby may be a little above or below. Both are fine if weight gain is on track.

The weight-based math

For bottle-fed babies under 6 months, the general formula is:

2.5 ounces of milk per pound of body weight per day

So a 10-pound baby needs about 25 ounces of milk in 24 hours. Spread that across however many feeds your baby is taking — usually 6 to 8 at this age.

This formula caps out around 32 ounces a day. Once your baby hits that, they don't need more milk by volume even as they grow, because their stomach capacity stops increasing rapidly. Babies who consistently want more than 32 oz at this age may be using the bottle for soothing, not hunger.

Worked example

Baby is 4 weeks old and weighs 9 pounds.

• 9 lbs x 2.5 oz = 22.5 oz per day
• Baby takes 7 feeds per day
• 22.5 ÷ 7 = roughly 3.2 oz per feed
• Make 3 to 3.5 oz bottles

Want the math done for you with growth-spurt adjustments? Use our calculator below.

Breastfed babies: a different math

If you're breastfeeding, the ounce-counting goes out the window. Breastfed babies regulate their own intake more dynamically than bottle-fed babies. Instead of counting ounces, watch:

• Wet diapers. 6+ wet diapers a day after day 5.
• Stools. 3 to 4+ yellow seedy stools a day in the first 6 weeks.
• Weight gain. 5 to 7 oz per week in the first 4 months, on average.
• Audible swallowing. You should hear baby swallowing during the feed.
• Contented baby. Settled, sleepy, or alert and happy after feeds.

If you want to know exact intake (for example, you're pumping into a bottle), one breastfed feed is typically 2 to 4 ounces from 2 to 6 months. Babies tend to settle around 25 to 28 oz per day from 1 month onward.

Combo feeding: how to split it

Combo feeding (some breast, some bottle) is common, especially after maternity leave ends. The math depends on your goals:

• To maintain supply, nurse first thing in the morning, before bed, and overnight. Bottles in between.
• To slowly switch to bottle only, drop one nursing session a week and replace with a bottle. Body adjusts gradually.
• To preserve a couple of nursing sessions, keep the morning and bedtime feeds at the breast. Easiest to maintain long-term.

The cues that matter more than ounces

Hunger cues (feed your baby)

• Rooting (turning head, opening mouth like searching for the breast)
• Bringing hands to mouth, sucking on fingers
• Lip smacking, sticking tongue out
• Fussing, then crying (a late cue — feed before you get here)

Full cues (stop feeding)

• Closing the mouth, turning head away
• Slowing sucks, falling asleep at the breast or bottle
• Pushing the bottle away with tongue
• Body relaxes, hands open up (newborns clench when hungry)

If your baby is consistently leaving an ounce in the bottle, make smaller bottles. If they're consistently looking for more after the bottle is empty, make slightly bigger ones. Adjust in half-ounce increments.

Common feeding traps

"Just finish the bottle"

Overfeeding is real, especially with bottle feeds. Bottles flow fast and easy, so babies can take in more than they want before their full signal kicks in. Use paced bottle feeding to slow things down and let baby regulate.

Forcing a 4-hour stretch

Schedules that say "feed every 4 hours" in the first month don't work for most newborns. They need to eat every 2 to 3 hours, sometimes more often during growth spurts. Trying to stretch feeds too early can hurt weight gain.

Topping off with formula every night

Common advice to "top off" breastfed babies with formula before bed for longer sleep often backfires. It signals your body to make less milk and can disrupt supply. If you want longer night stretches, focus on full feeds during the day instead.

Growth spurt feeding

Babies hit growth spurts at predictable times: 7 to 10 days, 2 to 3 weeks, 4 to 6 weeks, 3 months, and 6 months. During a spurt, expect them to want more milk for 2 to 4 days. Bump up bottles by half an ounce, or nurse more often. Things settle within a few days.

When weight gain stalls

Newborns lose 5 to 10% of birth weight in the first 3 to 5 days. They regain it by 10 to 14 days. After that, average gain is:

• 0 to 4 months: 5 to 7 oz per week
• 4 to 6 months: 4 to 6 oz per week
• 6 to 12 months: 2 to 4 oz per week

Your pediatrician will track this at every visit. If they flag a slow trend, the team will dig into feeding before assuming anything else. Don't try to diagnose underfeeding from a single weight check.

When to call your pediatrician

• Fewer than 6 wet diapers per day after week 1.
• No bowel movement in 24 to 48 hours (in the first 6 weeks).
• Baby is hard to wake for feeds, very floppy, or refuses multiple feeds in a row.
• Weight loss after the first week.
• Vomiting (different from spit-up) — forceful, projectile, or after every feed.
• Signs of dehydration: sunken soft spot, dry mouth, no tears, fewer wet diapers.