Baby Formula Calculator — How Much Formula Per Feeding
Enter your baby's weight and number of daily feedings to find out exactly how much formula to prepare per bottle and in total each day.
Weight unit
≈ 3.2 fl oz • based on 150 ml/kg/day
- 1
Daily formula (150 ml/kg)
5 kg × 150 ml/kg = 750 - 2
Per feeding
750 ml ÷ 8 feedings = 94
How does this calculator work?
Multiply your baby's weight in kg by 150 ml to get the recommended daily formula volume. Divide by the number of daily feedings (typically 8–12 for newborns, 5–6 for older babies) to get the per-bottle amount. The acceptable daily range is 120–200 ml/kg; let the baby self-regulate and consult a paediatrician with concerns.
Formula
How this is calculated
The calculator uses the WHO and AAP guideline of 150 ml of formula per kilogram of body weight per day as its target. This sits in the middle of the clinically accepted range of 120–200 ml/kg/day: energy-dense formulas sit at the lower end, standard term-infant formulas at the middle, and hungrier or rapidly growing babies sometimes need up to 200 ml/kg/day. The daily total is divided equally by the number of feedings to give the per-bottle volume.
In practice the per-feeding amount is a target, not a fixed dose. Formula-fed babies self-regulate intake, and a healthy baby will turn away from the bottle when full. Always prepare a little more than the target and let the baby decide when to stop; consistently finishing every bottle and still seeming hungry is a cue to increase the amount. If a baby regularly refuses bottles or gains weight poorly, the amount shown may be too high or too low — discuss it with a paediatrician.
This calculator applies to standard infant formula only. Breastfed babies regulate intake differently and volume cannot be measured directly. Premature or low-birth-weight babies may have different nutritional needs set by the neonatal team.
Frequently asked questions
Newborns (0–4 weeks) typically take 45–90 ml per feeding, 8–12 times per day — around 480–750 ml total. At 3.3 kg birth weight, the 150 ml/kg guideline gives about 500 ml/day; by 5 kg it rises to 750 ml/day.
Not rigidly — this is a population guideline. Prepare slightly more than the target and allow the baby to stop when satisfied. Never force a baby to finish a bottle. If intake is consistently far above or below the target and weight gain is a concern, speak to your paediatrician.
Most paediatric guidelines recommend introducing full-fat cow's milk after 12 months of age, once solid foods are well established. Standard infant formula is not generally recommended beyond 12 months for healthy term babies, though follow-on and toddler formulas exist.
TG we-Calculate Editorial Team. (2026). Baby Formula Calculator — How Much Formula Per Feeding [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/baby-formula-calculator
TG we-Calculate Editorial Team. "Baby Formula Calculator — How Much Formula Per Feeding." TG we-Calculate. 2026. https://we-calculate.com/calculator/baby-formula-calculator.
TG we-Calculate Editorial Team, "Baby Formula Calculator — How Much Formula Per Feeding," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/baby-formula-calculator
@misc{wecalculate_baby_formula_calculator, title = {Baby Formula Calculator — How Much Formula Per Feeding}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/baby-formula-calculator}}, year = {2026}, note = {TG we-Calculate} }
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