An 8-month-old typically needs about 24 ounces (720 mL) of formula per day, split across three to four bottles. That number drops from what your baby was drinking a few months ago because solid foods are now filling in a growing share of their daily calories.
The Daily Target: Around 24 Ounces
Between 8 and 12 months, babies need roughly 750 to 900 calories a day. About 400 to 500 of those calories should still come from formula, which works out to approximately 24 ounces. That’s a meaningful shift from the 28 to 32 ounces many babies drink at 4 or 5 months, before solids enter the picture.
Most parents find that three to four bottles of 6 to 8 ounces each covers the daily total comfortably. Some babies prefer smaller, more frequent bottles while others consolidate into fewer, larger ones. Either pattern is fine as long as the overall volume stays in the right ballpark. The upper limit for formula at any age is about 32 ounces (960 mL) in 24 hours. Consistently exceeding that can crowd out solid foods, which provide nutrients (especially iron and zinc) that formula alone can’t deliver in sufficient amounts at this stage.
Why Formula Intake Decreases at This Age
At 8 months, your baby is likely eating two to three meals of solid food each day, possibly with a snack. As they get better at chewing soft foods and accepting new textures, solids gradually take on a bigger role. Formula remains the nutritional backbone, but it’s no longer the only source of energy and nutrients. Think of formula and solids as partners: formula supplies the bulk of fat and calcium, while solids introduce iron-rich meats, fortified cereals, fruits, and vegetables that your baby’s growing body increasingly needs.
If your baby suddenly seems less interested in the bottle, it often just means they ate a solid meal recently and aren’t hungry yet. Spacing bottles about 30 minutes before or after solids gives them a chance to take both without one displacing the other.
A Typical Day’s Feeding Schedule
There’s no single “correct” schedule, but a common rhythm at 8 months looks something like this:
- Morning: 6 to 8 oz bottle, followed by a small breakfast of cereal or fruit
- Midday: Solid lunch (vegetables, protein, grain), then a 6 to 8 oz bottle
- Afternoon: Optional small bottle or snack
- Evening: Solid dinner, then a 6 to 8 oz bottle before bed
Some babies still want a nighttime feeding. If yours does, count that volume toward the daily total rather than adding it on top.
Reading Your Baby’s Hunger and Fullness Cues
Numbers are a useful guide, but your baby’s own signals are the most reliable measure of whether they’re getting enough. At 8 months, hunger cues include reaching for the bottle, opening the mouth eagerly, and getting fussy between meals. Fullness cues are equally clear: pushing the bottle away, turning their head, closing their mouth, or using hand motions to signal “done.”
Your baby does not need to finish every bottle. If they consistently leave an ounce or two, try preparing slightly smaller bottles to reduce waste. Forcing the last ounce can teach a baby to ignore their own fullness signals, which isn’t a habit you want to build.
Signs Your Baby Is Getting Enough
Steady weight gain along their personal growth curve is the clearest indicator that formula and food intake are on track. Other reassuring signs include five to six wet diapers a day, regular bowel movements (though frequency varies widely at this age), and an alert, active baby who hits developmental milestones on a normal timeline. If your baby seems satisfied after feedings, is growing consistently, and has good energy, the exact ounce count matters less than you might think.
Water and Other Drinks
Between 6 and 12 months, babies can have a small amount of plain water: about 4 to 8 ounces per day. Offer it in a sippy cup or open cup with meals to help them practice drinking. Water supplements hydration but shouldn’t replace formula at this age. Juice, cow’s milk, and plant-based milks are not recommended before 12 months.
When Formula Intake Seems Too High or Too Low
If your baby consistently drinks well over 32 ounces a day and shows little interest in solids, they may be filling up on formula and missing out on the iron and other nutrients that solid foods provide. Over time, this can contribute to iron-deficiency anemia. The fix is usually gradual: offer solids first when your baby is hungriest, then follow with a smaller bottle.
On the other end, some 8-month-olds go through phases where they drink noticeably less, often during teething, illness, or a developmental leap. A temporary dip of a few ounces is normal. If your baby drops well below 16 to 20 ounces per day for more than a couple of days, or shows signs of dehydration like fewer wet diapers or unusual lethargy, that’s worth a call to your pediatrician.