How much your baby needs to eat changes dramatically in the first year, starting with just a teaspoon per feeding and building to 6 to 8 ounces by around six months. The exact amount depends on your baby’s age, weight, and whether they’re breastfed or formula-fed, but there are reliable benchmarks at every stage that help you know things are on track.
The First Week: Smaller Than You Think
A newborn’s stomach is tiny. On day one, it holds only 5 to 7 milliliters, roughly one teaspoon. That’s why those first colostrum feeds seem impossibly small but are exactly the right amount. By day three, stomach capacity grows to about 22 to 27 milliliters, and by the end of the first week, your baby can take in 45 to 60 milliliters (1.5 to 2 ounces) at a feeding.
Bottle-fed newborns may only take half an ounce per feeding for the first day or two, then typically settle into 1 to 2 ounces per feeding. Breastfed newborns usually nurse every two hours, measured from the start of one feed to the start of the next, totaling 10 to 12 sessions in 24 hours. Bottle-fed babies eat slightly less often, every two to three hours, with eight feedings in 24 hours as a minimum.
One to Six Months: The Steady Climb
By the end of the first month, most babies consume 3 to 4 ounces per feeding, spaced roughly every three to four hours. This gradual increase continues until around six months, when many babies take in 6 to 8 ounces at each of four or five feedings per day.
For breastfed babies, individual feed volumes are harder to measure, but most take about 1 ounce per feeding in the early weeks, slowly increasing over time. The overall pattern is the same: feeds get larger and slightly less frequent as your baby grows. Most exclusively breastfed babies still eat every two to four hours, averaging 8 to 12 feeds per day for the first several months.
The Weight-Based Formula
A useful rule of thumb for formula-fed babies: plan for about 2.5 ounces of formula per day for every pound of body weight. A 10-pound baby, for example, would need roughly 25 ounces spread across the day’s feedings. This calculation works well through the first four to six months, though most babies cap out at about 32 ounces of formula daily regardless of weight.
Growth Spurts Change the Pattern
Just when you think you’ve figured out a rhythm, your baby may suddenly want to eat constantly. Growth spurts typically hit around 2 to 3 weeks, 6 weeks, 3 months, and 6 months. During these stretches, babies get fussier and want to nurse longer and more often, sometimes as frequently as every 30 minutes. This cluster feeding is normal and usually lasts two to three days before things settle back down. It doesn’t mean your milk supply is low or that your baby isn’t getting enough. Their body is simply signaling for more calories to fuel a burst of growth.
Six to Twelve Months: Adding Solid Foods
Around six months, solid foods enter the picture, but breast milk or formula remains the primary source of nutrition through your baby’s first birthday. Solids gradually make up a bigger share of the diet over these months, but they’re a complement to milk, not a replacement. Early on, solid food “meals” are more like practice sessions: a few spoonfuls of pureed vegetables or iron-fortified cereal once or twice a day, with milk feeds continuing on roughly the same schedule.
By 9 to 12 months, your baby will likely be eating solids two to three times a day with milk feeds filling in the gaps. There’s no precise ratio to hit. The transition is meant to be gradual, guided by your baby’s interest and readiness.
What Not to Give in the First Year
Babies under 12 months should not drink fruit or vegetable juice. Water is also unnecessary for most babies who are getting adequate breast milk or formula, and offering too much can fill their small stomachs without providing calories. After 12 months, if you do introduce juice, the recommendation is no more than 4 ounces of 100% fruit juice per day for toddlers ages one through three. Water and plain milk are better everyday choices.
How to Tell Your Baby Is Getting Enough
Since you can’t measure what a breastfed baby takes in, diaper output is the most practical indicator. After day five, a well-fed newborn produces at least six wet diapers per day. The number of dirty diapers varies more, especially as babies get older, but consistent wet diapers and steady weight gain at pediatric checkups are the two most reliable signs that feeding is on track.
Your baby’s behavior offers real-time feedback too. Hunger cues in the first five months include putting hands to mouth, turning toward the breast or bottle (called rooting), lip smacking, and clenched fists. When your baby is full, they’ll close their mouth, turn their head away, and relax their hands. After six months, the signals become more obvious: reaching for food when hungry, pushing food away or turning their head when done. Following these cues rather than forcing a set amount helps your baby learn to eat when hungry and stop when satisfied.
Night Feeds and When They Taper Off
Night feedings are a normal part of infant life, but they don’t last forever. Formula-fed babies often stop needing overnight feeds around six months, because formula digests more slowly and keeps them satisfied longer. A formula-fed baby over six months who wakes at night is unlikely to be waking from hunger. Breastfed babies may continue to benefit from night feeds longer, and night weaning is generally considered a reasonable option starting around 12 months for healthy breastfed children. Every baby is different, and some naturally drop night feeds earlier on their own.
Quick Reference by Age
- Day 1: 1 teaspoon (5 to 7 ml) per feed, 10 to 12 feeds per day
- Day 3: About 1 ounce per feed
- 1 week: 1.5 to 2 ounces per feed
- 1 month: 3 to 4 ounces per feed, every 3 to 4 hours
- 6 months: 6 to 8 ounces per feed, 4 to 5 feeds per day, plus starting solids
- 9 to 12 months: Breast milk or formula still central, with 2 to 3 solid meals per day
These numbers are averages. Some babies consistently eat a little more or less and grow perfectly well. The best measure of whether your baby is eating enough isn’t hitting an exact ounce target. It’s steady weight gain, plenty of wet diapers, and a baby who seems content between feeds.