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How much water should a toddler drink?

Most toddlers only need about 8 to 32 ounces (roughly half a cup to one cup) of plain water a day, on top of the fluids they get from milk and food. This can go up if it's hot out or your child is very active.

Toddlers get most of their hydration from breast milk, formula, cow's milk, and food, so extra plain water needs are small compared to adults.

Strength of evidence

Good

Based on consensus recommendations from national pediatric and nutrition organizations rather than a controlled trial, so it reflects expert guideline consensus more than experimental proof.

What the evidence says

For toddlers around 12 to 24 months old, both the CDC and the American Academy of Pediatrics suggest offering about 8 to 32 ounces of plain water a day, alongside their regular milk and meals. This is meant to top up hydration, not replace milk or formula, which still provide most of the calories and nutrients toddlers need at this age.

Canadian guidance (Caring for Kids/CPS) notes that fully breastfed babies don't need extra water, and once a baby starts solid foods, water can be offered occasionally in an open cup, especially between meals if your child seems thirsty.

How much a toddler needs isn't a strict number - it depends on their size, activity level, and the weather. An AAP nutrition expert has noted that kids need more water when it's hot or when they're very active outside, so it's fine to offer extra water in those situations.

A simple approach: offer water with meals and snacks, and let your toddler drink to their own thirst cues rather than forcing a specific amount, unless a doctor has told you otherwise for a medical reason.

Sources

✓Reviewed by CH, MD, FRCPC

Reviewed by a specialist physician certified by the Royal College of Physicians and Surgeons of Canada, who has read this answer against the sources listed above and confirmed it reflects them. That is not medical advice about your child. How we review

Answer checked October 22, 2026

Educational information only. Not medical advice, not a diagnosis, and no doctor-patient relationship is created by using this. Founded Parent has not examined your child and does not know their history, so this may not apply to you. In an emergency, call your local emergency number. What Founded Parent cannot do

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