A 12-month-old should be drinking no more than 16 to 24 ounces of milk per day, and at this age, that milk should be transitioning from formula to whole cow’s milk. Most pediatric guidelines recommend making the switch right around the first birthday, so the answer to “how much formula” is really about how to phase it out while keeping your child well-nourished.
The 16 to 24 Ounce Daily Limit
Whether your child is still on formula or has already switched to whole milk, the daily target is the same: 16 to 24 ounces total, spread across the day alongside three meals and two to three snacks. That works out to roughly two to three cups. Going over 24 ounces consistently raises the risk of iron deficiency anemia, because milk fills kids up and displaces the iron-rich solid foods they need at this stage. It can also crowd out fiber and other nutrients that only come from a varied diet.
Why It’s Time to Switch to Whole Milk
The American Academy of Pediatrics has stated that toddler formula offers no nutritional advantage over plain whole cow’s milk. That’s a strong position, and it’s backed by a regulatory gap worth knowing about: infant formula (for babies under 12 months) is required by federal law to meet strict nutritional standards reviewed by the FDA. Formulas marketed for toddlers don’t have to meet those same standards. They’re largely made of powdered milk, vegetable oil, and sweeteners.
Pasteurized whole cow’s milk, on the other hand, delivers calcium, vitamin D, protein, vitamin B12, phosphorus, and healthy fat. Once your child turns one, their nutritional needs shift toward what solid food and whole milk can provide together. Children 12 to 24 months need 600 IU of vitamin D each day, and fortified whole milk is one of the easiest ways to get there.
How to Make the Transition
You don’t need to switch cold turkey. If your child doesn’t take to the taste of cow’s milk right away, mix equal parts whole milk and prepared formula in the same cup. Over the course of a week or two, gradually increase the ratio of whole milk until formula is out of the picture entirely. Some pediatricians suggest offering a small amount of whole milk (about an ounce) once a day starting around 11 months, just to let your child get used to the flavor before the full switch.
Children’s Hospital of Philadelphia recommends this gradual blending approach specifically because some babies resist the taste change. It’s a texture and flavor difference, not a nutritional problem, so patience is the main tool here.
Switching From Bottles to Cups
Twelve months is also the right time to start moving away from bottles. Toddlers who keep drinking from bottles well into their second year face a higher risk of tooth decay, tooth alignment problems, and even speech delays, since the muscles used for sucking are different from those needed for clear speech. Bottles also make it easy for kids to sip all day long, which keeps them too full to eat solid food at meals and can contribute to excess calorie intake.
The AAP recommends offering a cup as early as six months and completing the bottle-to-cup transition sometime between 12 and 18 months. You can use a sippy cup, a straw cup, or an open cup. If you go with a sippy cup, look for one without a no-spill valve. Valved sippy cups force kids to suck the same way they would on a bottle, which defeats the purpose of the switch. Sippy cups are meant to be a temporary bridge; the goal is drinking from an open cup by around age two.
A practical approach: start by eliminating bottles at mealtimes first, offering milk in a cup alongside food. Keep the bottle for naps or bedtime a little longer if needed, then phase those out too. Filling bottles with plain water instead of milk during the transition can help your child lose interest in the bottle on their own.
What a Typical Day Looks Like
At 12 months, milk is no longer the centerpiece of your child’s diet. It’s a supplement to solid food. A reasonable day might include milk offered in a cup at breakfast, lunch, and dinner, totaling somewhere around 16 to 20 ounces. The rest of their nutrition comes from three meals and a couple of snacks.
If your child is consistently drinking less than 16 ounces but eating a wide variety of solid foods (including dairy like yogurt and cheese), that’s generally fine. The concern goes in the other direction: too much milk, not too little. Kids who fill up on milk tend to refuse meals, which creates a cycle where they rely even more heavily on milk for calories and miss out on the nutrients solid foods provide.
Signs Your Child Is Getting Enough
The simplest indicator is wet diapers. A well-hydrated toddler urinates regularly throughout the day with light-colored urine. Other reassuring signs include steady weight gain, active and energetic behavior between naps, and a willingness to eat at mealtimes. Cool or mottled skin, unusually dark urine, very few wet diapers, and persistent lethargy are signs of dehydration that need prompt attention.
Beyond hydration, watch for signs that milk intake is crowding out food. If your child consistently refuses meals but happily drinks cup after cup of milk, it’s worth cutting back to the lower end of the 16 to 24 ounce range and offering milk only after they’ve had a chance to eat solid food first.