A 9-month-old typically needs about 30 to 32 ounces of breast milk or formula per day, spread across 3 to 5 feedings. That total is lower than what your baby was drinking a few months ago, and that’s by design. At this age, solid foods are playing a bigger role in your baby’s diet, and milk intake naturally decreases to make room.
Daily Milk Intake at 9 Months
Stanford Medicine Children’s Health recommends 30 to 32 ounces of breast milk or formula per day for a 9-month-old, divided into 3 to 5 feedings. If your baby takes 4 bottles a day, that works out to roughly 7 to 8 ounces per bottle. Breastfed babies may nurse on a slightly different schedule, but the overall volume lands in the same range.
Some babies at this age start to seem less interested in the bottle or breast, especially after a meal of solid food. That’s normal. The key is that total daily intake stays in that 30-to-32-ounce range. If your baby consistently drinks well under 24 ounces or refuses multiple feedings, it’s worth checking in with your pediatrician.
How Solids Change the Equation
At 9 months, your baby should be eating solid foods at about 3 meals a day, with 2 to 3 snacks in between. The CDC recommends offering something to eat or drink every 2 to 3 hours, totaling 5 to 6 eating opportunities throughout the day. Milk feedings fit into this rhythm alongside solids rather than replacing them entirely.
A practical approach is to offer breast milk or formula first thing in the morning, before or after solid meals during the day, and again before bed. Some parents find that giving milk about 30 minutes before solids keeps their baby interested in both. Others reverse the order and offer solids first, then top off with milk. Either approach works as long as your baby is getting enough of both.
Too much milk can actually work against your baby at this age. If a 9-month-old fills up on formula or breast milk, they may refuse solid foods that provide nutrients milk doesn’t supply well on its own, particularly iron and zinc. On the other hand, cutting milk too aggressively in favor of solids can leave your baby short on calories and fat needed for brain development.
Why Cow’s Milk Should Wait
Even though your baby is eating table foods, cow’s milk is not a substitute for breast milk or formula until after the first birthday. The American Academy of Pediatrics recommends only breast milk or formula as the primary milk source for babies under 12 months. Cow’s milk is low in iron and, in larger amounts, can actually block iron absorption from the foods your baby eats.
There is one small exception: starting around 11 months, you can try offering about an ounce of whole cow’s milk in a sippy cup once a day for a couple of weeks to ease the transition. But at 9 months, stick with breast milk or formula for all milk feedings. Dairy foods like yogurt and cheese are fine as part of solid meals, since they’re consumed in smaller amounts and don’t replace a full feeding.
Water Alongside Milk
Between 6 and 12 months, babies can have 4 to 8 ounces of plain water per day. This isn’t a replacement for milk. It’s a small supplement, especially helpful during meals to help wash down solid foods and get your baby comfortable drinking from a cup. Offering water in an open cup or straw cup during mealtimes is a good way to build that skill without cutting into milk intake.
Signs Your Baby Is Getting Enough
After the newborn stage, the clearest indicator of adequate intake is steady weight gain along your baby’s growth curve. Day to day, you should see at least 6 heavy wet diapers in a 24-hour period. Your baby should seem alert, active, and generally content between feedings. Dry lips, fewer wet diapers, or unusual fussiness can signal that intake is too low.
Growth tends to slow somewhat after the first 6 months, so don’t be alarmed if your baby isn’t gaining weight as rapidly as before. What matters is a consistent pattern on their growth chart, not hitting a specific number on the scale each week.
A Sample Feeding Day
- Early morning: 7 to 8 oz breast milk or formula
- Mid-morning: Solid food breakfast, followed by a small snack if needed
- Midday: 7 to 8 oz breast milk or formula, plus a solid food lunch
- Afternoon: Snack with a few sips of water
- Evening: Solid food dinner, then 7 to 8 oz breast milk or formula before bed
This is a template, not a strict schedule. Some babies prefer 4 or 5 smaller milk feedings rather than 3 larger ones, and that’s perfectly fine as long as the daily total stays around 30 to 32 ounces. Follow your baby’s hunger cues, and adjust the timing to fit your family’s routine.