Free tool
How much formula does my baby need?
Enter your baby’s weight and age for ounces per day and per bottle, using the AAP’s 2.5 oz-per-pound guide and the CDC’s typical amounts by age.
Enter your baby’s weight.
Typical formula amounts by age
| Age | Per feed | How often |
|---|---|---|
| First days | 1–2 oz | every 2–3 hours |
| 2 months | 4–5 oz | every 3–4 hours |
| 4 months | 4–6 oz | every 3–4 hours |
| 6 months | 6–8 oz | 4–5 times a day |
More detail in how much should a baby eat?
FAQ
How much formula should a baby have per day?
About 2.5 oz per pound of body weight per day (about 150 ml per kg), and most babies don’t need more than 32 oz (about 950 ml) a day (AAP).
How many ounces should a 2-month-old drink?
Usually about 4–5 oz per feed, every 3–4 hours (CDC).
How much breast milk should I put in a bottle?
About 25 oz (750 ml) a day between 1 and 6 months, divided by the number of feeds — 8 feeds ≈ 3 oz each.
My baby wants more (or less) than the calculator says. Is that OK?
Usually, yes. Appetite varies from feed to feed and day to day. Feed to hunger cues, and check with your pediatrician about weight gain, diapers, or if your baby regularly wants more than 32 oz.
Sources: AAP / HealthyChildren.org; CDC “How Much and How Often to Feed Infant Formula”; Kent et al., Pediatrics 2006. For information only; not medical advice — follow your pediatrician’s guidance, especially for premature babies or special formulas.
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