Baby Milk Feed Calculator
Estimates how much milk a baby needs in a day and per feed from body weight, using the common 150 millilitres per kilogram guide.
Recent
Formula
How the calculation works
Enter the baby's weight in kilograms as measured at the most recent check, since the milk need scales directly with weight.
Enter how many times the baby feeds in a day and the age in months to keep a useful record alongside the figure.
The tool multiplies weight by 150 for the daily millilitres and divides that by the number of feeds to give the amount for each feed.
Common mistakes
- Treating the figure as a strict rule, when babies feed to appetite and the guide only shows the average need over twenty-four hours.
- Ignoring that breastfed babies are fed on demand, since this estimate suits measured feeds and not latching on for comfort.
When to use it
- Use it to see roughly how much to prepare for each feed, so you waste less formula and still meet the daily amount.
- Use it to check whether a change in weight has reasonably changed the daily milk need as your baby grows.
Worked example
A 4 kg baby fed 6 times a day needs about 600 ml a day, which is about 100 ml per feed.
Common questions
Should I wake my baby to reach the daily amount?
No, waking a sleeping baby to hit a number is not advised, and you should follow your health visitor's or doctor's guidance on feeding frequency for your baby's age.
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