A 17-month-old should drink about 16 ounces (2 cups) of whole milk per day. That’s the amount recommended for children between 12 and 24 months, and it provides a solid foundation of calcium, vitamin D, and fat without crowding out other important foods.
Why 16 Ounces Is the Target
Two cups of whole milk gives your toddler a meaningful dose of calcium, protein, and vitamin D, which is essential for bone growth. Children between 12 and 24 months need 600 IU of vitamin D each day, and fortified cow’s milk is one of the easiest ways to get there. The fat in whole milk also supports brain development during a period of rapid neurological growth.
That said, 16 ounces is a target, not a rigid rule. Some days your toddler will drink a little more, some days less. The key is staying in a reasonable range and not letting milk become the main source of calories in their diet.
What Happens if Your Toddler Drinks Too Much
The upper limit to keep in mind is 24 ounces (3 cups) per day. Beyond that, milk starts causing problems rather than solving them. The biggest concern is iron deficiency. Milk is very low in iron, and toddlers who fill up on it tend to eat fewer iron-rich solid foods like meat, beans, and fortified cereals. Over time, this can lead to iron deficiency anemia, which affects energy levels, growth, and cognitive development.
Excessive milk intake also displaces the fiber and variety of nutrients that come from a balanced diet of solid foods. A toddler drinking 4 or 5 cups of milk a day may seem well-fed but could be missing out on the broad nutrition their body actually needs at this stage.
Whole Milk, Not Low-Fat
At 17 months, your child should be drinking whole milk, not reduced-fat, low-fat, or skim. Young children need the extra fat for healthy growth and brain development. The most recent Dietary Guidelines for Americans (2025-2030) actually reinforced this by recommending full-fat dairy with no added sugars for young children, a shift from earlier guidance that had suggested switching to low-fat dairy after age 2.
If your child has excessive weight gain or a family history of obesity, high cholesterol, or heart disease, their pediatrician may recommend a lower-fat option. For most toddlers, though, whole milk is the right choice through at least age 2.
Plant-Based Milk Alternatives
If your family avoids cow’s milk, fortified unsweetened soy milk is the only plant-based alternative that nutritionally matches cow’s milk closely enough to serve as a true substitute. The FDA and the Dietary Guidelines both recognize it as an equivalent option for toddlers aged 12 to 23 months because it delivers comparable protein, calcium, vitamin A, and vitamin D.
Other plant milks (oat, almond, coconut, rice) fall short in one or more categories, usually protein. Almond milk, for instance, contains very little protein compared to cow’s milk or soy milk. These can be part of your child’s diet, but they shouldn’t be the primary milk source unless you’re deliberately making up the nutritional gaps elsewhere. Whichever option you choose, look for unsweetened and unflavored varieties.
Ditch the Bottle by Now
At 17 months, your toddler should ideally be drinking milk from an open cup or a straw cup rather than a bottle. Guidelines recommend completing the bottle-to-cup transition somewhere between 12 and 18 months. This matters more than it might seem, because bottles make it easy for toddlers to sip milk throughout the day, which suppresses their appetite for solid food at mealtimes. Kids who carry bottles around often end up consuming more milk than they need, turning it into a high-calorie snack that contributes to excessive weight gain.
Switching to a cup naturally limits how much milk your toddler drinks at a sitting, which helps keep their intake closer to that 16-ounce target and leaves room for the solid foods they need.
Practical Ways to Hit the Right Amount
Sixteen ounces splits neatly into two 8-ounce servings, one with breakfast and one with an afternoon snack or dinner. You don’t need to measure precisely every day, but having a rough routine helps. Some parents find it useful to pour the day’s milk into a single container in the morning so they can see at a glance how much has been consumed.
If your toddler isn’t interested in drinking much milk, don’t force it. Dairy from other sources counts too. Yogurt, cheese, and even milk used in cooking all contribute calcium and vitamin D. A child who eats a cup of yogurt and a serving of cheese during the day may not need a full 16 ounces of milk on top of that. The goal is overall dairy intake, not milk specifically.
On the flip side, if your toddler constantly wants more milk, try offering water between meals and limiting milk to mealtimes. This protects their appetite for the variety of foods they need and keeps milk in its proper role: an important part of the diet, but not the centerpiece.