Baby Formula Calculator
Last updated: 2026-06-25
For babies under 6 months, the recommended daily formula amount is roughly weight (kg) × 150 ml (range 120-180 ml), and usually no more than about 960 ml a day.
Per-feeding amount = recommended daily amount ÷ feedings per day. Amounts vary a lot between babies, so use this as an estimate only and confirm the right amount with your pediatrician.
Enter your baby's details
Recommended daily formula amount (estimate)
0ml
| Item | Value |
|---|---|
| Applied rate (per kg) | |
| Recommended daily amount | |
| Recommended daily range | |
| Feedings per day | |
| Per-feeding amount (approx.) |
This result is a reference estimate based on general guidelines. The right intake differs for every baby, so check your baby's growth curve and consult a pediatrician for the accurate amount.
How to use
- Enter weight — enter your baby's current weight in kilograms (kg).
- Enter age in months — entering the age in months applies the adjustment for starting solids.
- View the result — press Calculate to see the recommended daily and per-feeding amount in a table with the recommended range.
How to calculate formula amount and guidelines by month
The most widely used baseline for formula feeding is about 150 ml per kg of body weight per day. Sources such as the American Academy of Pediatrics (AAP) suggest about 150 ml per kg per day (roughly a 120-180 ml range) for babies under 6 months, with total formula kept under about 960 ml (about 32 oz) a day. After solids begin around 6 months, formula makes up a smaller share, so this calculator lowers the rate slightly with age.
| Age | Feedings per day | Per feeding (approx.) |
|---|---|---|
| 0-1 month (newborn) | 8-12 | 60-90 ml |
| 1-2 months | 7-9 | 90-120 ml |
| 2-4 months | 6-8 | 120-150 ml |
| 4-6 months | 5-6 | 150-210 ml |
| 6-9 months (solids begin) | 4-5 | 180-240 ml + solids |
| 9-12 months | 3-4 | 180-240 ml + solids |
The formula is recommended daily amount = weight (kg) × 150 ml (the per-kg rate is lowered as age increases), and per-feeding amount = recommended daily amount ÷ feedings per day. The daily total is capped at about 960 ml. These figures are averages and vary with breastfeeding, mixed feeding, and your baby's appetite.
To check feeding intervals and frequency by month, use the feeding interval calculator; to see how your baby's height and weight compare with peers, use the infant growth percentile calculator. For more detail, see the complete baby feeding guide by month.
Frequently asked questions (FAQ)
How do I calculate formula amount for a newborn?
In general, babies under 6 months are recommended about 150 ml of formula per kg of body weight per day (range 120-180 ml). For example, a 4 kg baby needs roughly 600 ml a day. However, total formula is usually kept under about 960 ml per day, and amounts vary a lot between babies, so adjust to your baby's appetite and growth and consult your pediatrician.
How do I set the per-feeding amount?
The per-feeding amount is the recommended daily amount divided by the number of feedings per day. Newborns typically feed 8-12 times a day, 2-3 month olds 6-8 times, and 4-6 month olds 5-6 times. How much a baby takes at each feeding varies, so use this as a rough guide rather than an exact target.
My baby eats less or more than the recommended amount. Is that okay?
The recommended amount is just an average; every baby has a different appetite and activity level. If weight is gaining normally, there are at least 6 wet diapers a day, and the baby sleeps well and is alert, some difference from the recommended amount is usually fine. See a pediatrician if you notice a sudden drop in appetite, stalled weight, or signs of dehydration.
Should I reduce formula once we start solids?
Formula intake usually decreases gradually as solids begin around 6 months. In the early stage, formula is still the main source of nutrition, so do not cut it sharply; reduce the number and size of feedings naturally as solid intake grows. After 12 months, you can consider switching to whole milk and regular meals.
Related calculators & guides
Feeding Interval Calculator
Check the recommended feeding interval and frequency by month.
Infant Growth Percentile
See how your baby's height and weight compare with peers.
Vaccine Schedule
Check the standard vaccine schedule from your baby's birth date.
Baby Feeding Guide by Month
Formula amount, feeding interval, and solids in one guide.
Last updated: 2026-06-25