Formula needs grow with your baby. Newborns take small, frequent feeds; by 4–6 months most take 4–5 bottles of 180–240 mL (6–8 oz). Follow your baby’s hunger and fullness cues rather than finishing every bottle.
How to use the Baby Formula Calculator
- Weight
- Age
- Feeds per day
Results update as you type, and every field accepts the units shown in its menu.
How it works
Enter your baby’s weight and age and how many feeds a day.
Inputs explained
| Field | What to enter |
|---|---|
| Weight | Units: kg, lb, g |
| Age | Units: months, years, weeks |
| Feeds per day | A number |
What each result means
- Formula per day = min([Weight]×150, 950)
- Per feed = [Formula per day]÷[Feeds per day]
Example values
How the main result changes when Weight changes and everything else stays at the example values above:
| Weight (kg) | Formula per day (mL) |
|---|---|
| 2.5 | 375 |
| 3.75 | 563 |
| 5 | 750 |
| 6.25 | 938 |
| 7.5 | 950 |
| 10 | 950 |
Health note: this calculator is for education and screening only and is not a diagnosis or treatment advice. Discuss your results with a qualified clinician.
Formula
Daily formula ≈ 150 mL/kg (2.5 fl oz per lb), maximum about 950 mL (32 fl oz)
Per feed = daily amount ÷ feeds per day
Worked example
Inputs — Weight: 5 kg; Age: 2 months; Feeds per day: 7.
Results — Formula per day = 750 mL; Per feed = 107 mL; Typical feeds per day at this age = 6–7.
Key terms
- Responsive feeding
- Feeding based on the baby's hunger and fullness signals.
Frequently asked questions
How much formula does a newborn need?
About 30–60 mL (1–2 oz) every 2–3 hours in the first days, rising quickly.
Can a baby have too much formula?
Yes – signs include spitting up and discomfort; follow fullness cues.
When do babies need less formula?
After starting solids at around 6 months, milk intake gradually falls.