Most breastfed babies drink between 24 and 30 ounces of milk per day once they hit their stride around 3 to 4 months old. But intake varies significantly in the early weeks, shifts as solids enter the picture, and looks different at every stage. Here’s what to expect from the first days through toddlerhood.
The First Month: A Rapid Ramp-Up
Newborns start small. In the first 72 hours, a baby takes in roughly 1 ounce per feeding, which matches the tiny amount of colostrum your body produces. By the end of the first week, that climbs to 1 to 2 ounces per feeding. During weeks two and three, most babies are taking 2 to 3 ounces at a time.
Across a full day, newborns in their first month drink anywhere from 8 to 24 ounces total. That’s a wide range because a 5-day-old and a 28-day-old are in very different places. Feeding frequency is high during this period: expect 8 to 12 sessions in 24 hours, which works out to a feeding roughly every 2 to 3 hours around the clock.
1 to 6 Months: The Peak Intake Window
Between about 2 and 5 months, daily intake typically falls in the range of 20 to 36 ounces. Most babies settle into a pattern of 4 to 6 ounces per feeding, spacing sessions out to roughly every 3 to 4 hours. By 3 to 4 months, the average is around 24 to 30 ounces per day.
A useful rule of thumb for this age: babies generally need about 2.5 ounces of breastmilk per day for every pound of body weight. So a 12-pound baby would need roughly 30 ounces. This calculation works well through the first 3 to 4 months, though individual babies vary based on metabolism, growth rate, and how efficiently they nurse.
One thing that surprises many parents is that breastmilk intake stays relatively flat from about 1 month through 6 months. Unlike formula-fed babies, who tend to gradually increase volume over time, breastfed babies reach their peak daily intake fairly early and hold steady. The milk itself changes in composition to meet the baby’s evolving nutritional needs, so the volume doesn’t need to keep climbing.
6 to 12 Months: Solids Enter the Picture
Once solid foods are introduced around 6 months, breastmilk remains the primary source of nutrition for a while, but total milk volume gradually decreases. During months 6 through 8, babies may drink anywhere from 18 to 40 ounces per day depending on how much solid food they’re eating. Individual bottles or nursing sessions still tend to be around 3 to 4 ounces.
Feeding frequency becomes less predictable in this stage. Some babies drop to 4 or 5 nursing sessions a day as they eat more solids, while others continue nursing frequently and treat food as a complement rather than a replacement. Following your baby’s hunger cues matters more here than hitting a specific ounce target. By 12 months, average breastmilk intake drops to roughly 20 ounces per day (about 593 mL), though this varies widely.
12 to 24 Months: Nursing as a Supplement
Toddlers who continue breastfeeding have highly variable patterns. Some nurse only in the morning and before bed, taking in a relatively small amount of milk. Others rely on breastmilk for a significant share of their daily calories. There’s no single “right” volume at this stage, since solid food and other beverages are meeting most nutritional needs.
The frequency and duration of toddler nursing sessions is driven more by comfort, routine, and the child’s individual preference than by caloric need. Many toddlers naturally reduce their intake over time as their interest in table food grows.
Growth Spurts Change the Pattern Temporarily
At certain predictable points, your baby will suddenly want to nurse far more often than usual. These growth spurts typically hit around 2 to 3 weeks, 6 weeks, 3 months, and 6 months. During a spurt, a baby who was nursing every 3 hours might want to feed every hour or even more frequently, a pattern sometimes called cluster feeding.
This can feel alarming, especially if you interpret the increased demand as a sign your supply is dropping. It isn’t. The extra nursing signals your body to produce more milk, and within a few days the baby usually returns to a more normal schedule. Growth spurts typically last 2 to 3 days, occasionally up to a week.
Bottle Sizes for Expressed Milk
If you’re pumping and bottle-feeding, knowing the right bottle size helps prevent overfeeding. Babies tend to drink more from a bottle than they would at the breast, because milk flows more freely and the sucking reflex keeps them swallowing even when they’re full. Here’s a general guide to how much expressed milk to put in a bottle:
- First week: 1 to 2 ounces per bottle
- Weeks 2 to 3: 2 to 3 ounces per bottle
- 1 to 6 months: 3 to 4 ounces per bottle
- 6 months and beyond: 3 to 4 ounces per bottle
Notice that bottle size stays at 3 to 4 ounces from 1 month onward. Rather than increasing bottle size, you adjust the number of bottles to meet daily needs. Paced bottle feeding, where you hold the bottle more horizontally and let the baby control the pace, helps mimic the experience of nursing and reduces the chance of overfeeding.
Signs Your Baby Is Getting Enough
Since you can’t measure ounces during a nursing session the way you can with a bottle, diaper output and weight gain are the two most reliable indicators that your baby is drinking enough.
In the first few days, babies typically produce one wet diaper per day of life: one on day one, two on day two, and so on. Once your milk fully comes in (usually around day 3 to 5), that jumps to 5 to 6 wet diapers every 24 hours. After about 6 weeks, the number of wet diapers may dip to 4 or 5 per day, but the volume of urine in each diaper increases as the bladder grows.
For weight gain, the benchmark after your milk comes in is about 6 ounces per week (170 grams). Most newborns lose a small percentage of their birth weight in the first few days, then regain it by about 10 to 14 days old. Steady weight gain after that point is the strongest sign that intake is on track. Your pediatrician tracks this at well-child visits, but if you’re concerned between appointments, many lactation consultants offer weighted feeds where the baby is weighed before and after nursing to measure exactly how much milk was transferred.