Baby formula amount calculator
A rough guide for parents who formula feed in the first six months, before solid food starts.
Loading the tool…
Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter baby’s weight, weight unit and feeds per day.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Daily amount = 2.5 fl oz per pound of body weight (about 163 mL per kg), up to 32 fl oz (946 mL) a day. 1 lb = 0.45359237 kg, 1 fl oz = 29.5735295625 mL. Per feed = daily amount ÷ feeds.
Example
Inputs: Baby’s weight = 4.5, Weight unit = Kilograms, Feeds per day = 8. Result: Daily amount: 733 mL; Daily amount in ounces: 24.8 fl oz; Per feed: 92 mL.
Limits and caveats
- This is a rough average and babies differ; growth and wet diapers are the real guide.
- It does not apply to breastfeeding, premature babies or babies with medical conditions.
- Once solids start around 6 months, the need for formula gradually drops.
Questions about this tool
Where does 2.5 ounces per pound come from?
From American Academy of Pediatrics guidance on HealthyChildren.org, with a limit of 32 ounces a day.
How many feeds does a newborn need?
Newborns often feed every 2 to 3 hours, 8 or more times a day, and feed less often as the stomach grows.
Should my baby finish every bottle?
No. Stop when your baby shows fullness, such as turning away or closing the mouth.