A 6-month-old typically drinks 24 to 32 ounces of breast milk or formula per day, spread across about five to six feedings. That works out to roughly 4 to 6 ounces per feeding, though the exact amount varies depending on whether your baby has started solid foods and whether they’re breastfed or formula-fed.
Formula-Fed Babies at 6 Months
Most formula-fed 6-month-olds need about 24 to 32 ounces of formula daily, divided into five or six bottles. Each bottle usually holds 4 to 8 ounces, depending on the time of day and how hungry your baby is. Babies getting 32 ounces or more per day from formula don’t need a separate vitamin D supplement, since formula is fortified.
At this age, a baby’s stomach can hold about 7 to 8 ounces at a time. That’s the physical upper limit for a single feeding, and most babies won’t consistently take that much. If your baby regularly drains 8-ounce bottles and still seems hungry, it’s worth checking with your pediatrician rather than simply offering more.
Breastfed Babies at 6 Months
Breastfed babies typically take 3 to 4 ounces per feeding when drinking expressed milk from a bottle, adding up to roughly 18 to 24 ounces over a 24-hour period. One thing that surprises many parents: breast milk intake stays relatively stable from about 4 weeks of age through 6 months. Unlike formula-fed babies, who gradually increase their volume as they grow, breastfed babies consume a similar total daily volume for months because breast milk composition changes to meet their evolving nutritional needs.
If you’re nursing directly, you obviously can’t measure ounces. Steady weight gain and consistent wet diapers (at least six per day) are your best indicators that your baby is getting enough. A healthy 6-month-old should be gaining at least 0.67 ounces of body weight per day.
How Solid Foods Change the Math
Six months is when most babies start solid foods, and this gradually shifts the balance. In the early weeks of solids, your baby is mostly tasting and exploring textures. Breast milk or formula still provides the majority of calories and nutrients during the entire first year. A few spoonfuls of pureed sweet potato won’t meaningfully reduce how much milk your baby needs.
Over the following months, as your baby gets more skilled with eating and takes in larger portions of food, milk intake will naturally decline. Let your baby set that pace. Cutting back on milk too quickly to encourage more solids can actually backfire, leading to poor weight gain or nutritional gaps. Think of solids as an addition to milk at 6 months, not a replacement.
Water and Other Drinks
Once your baby turns 6 months old, you can start offering small sips of water, particularly with meals. The CDC recommends 4 to 8 ounces of plain water per day for babies between 6 and 12 months. This isn’t a requirement, just an option. Water at this age helps your baby get used to drinking from a cup and can aid digestion as solids increase.
Juice is not necessary, but if you do introduce it, keep it to no more than 4 to 6 ounces per day and wait until your baby is closer to 6 to 9 months old. Water and milk (breast milk or formula) are all your baby needs to drink right now.
Reading Your Baby’s Hunger and Fullness Cues
Ounce guidelines are useful starting points, but your baby is the best judge of how much they need on any given day. Some days they’ll be hungrier than others, especially during growth spurts. Rather than fixating on hitting an exact number, pay attention to the signals your baby gives you.
Signs your baby has had enough include pushing the bottle or breast away, closing their mouth when you offer more, turning their head to the side, or using hand motions to signal they’re done. Respecting these cues, even if the bottle isn’t empty, helps your baby develop healthy self-regulation around eating.
On the flip side, if your baby is consistently taking less than 18 to 20 ounces per day, seems unusually fussy after feedings, or isn’t gaining weight steadily, those are signs they may not be getting enough. Your pediatrician can check growth trends and help troubleshoot.