breastmilk calculator. Get instant, accurate results. Enter values for instant results with step-by-step formulas.
Reviewed for accuracy by Rahul Singh, Health & Wellness Specialist
Reviewed for accuracy by Rahul Singh, Health & Wellness Specialist
Medical disclaimer:
This calculator is provided for educational and informational purposes only and does not constitute medical advice, diagnosis, or treatment. Results are general estimates and may not reflect your individual circumstances. Always consult a qualified healthcare professional before making decisions about your health.
Breastmilk Calculator
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Formula: Daily Need ≈ 150 mL/kg (range 120-180 mL/kg) | Per Feeding = Daily Total / Number of Feedings
Your Result
Worked example — 750 mL/day, 94 mL per feeding
Formula
Daily Need ≈ 150 mL/kg (range 120-180 mL/kg) | Per Feeding = Daily Total / Number of Feedings
Breastfed babies typically need about 150 mL (5 oz) per kg of body weight daily during months 1-6. This stabilizes around 750-900 mL (25-30 oz) per day. Per feeding = daily total divided by number of feedings.
Worked Examples
Example 1: 5kg baby, 8 feedings
Problem:5 kg baby, 3 months, 8 feedings/day
Solution:Daily: 5 x 150 = 750 mL. Per feeding: 750/8 = 94 mL (3.2 oz)
Result:750 mL/day, 94 mL per feeding
Frequently Asked Questions
How much breastmilk does a baby need?
On average, 25-30 oz (750-900 mL) per day from 1-6 months. Newborns start at smaller volumes (30-60 mL per feeding) and increase. Intake stabilizes by 1 month.
How do I know if my baby is getting enough breast milk?
Signs that your baby is getting adequate breast milk include consistent weight gain after the initial newborn weight loss (most babies regain birth weight by 10-14 days), at least 6 wet diapers per day after day 5, regular yellow seedy stools in the early weeks, the baby appearing satisfied and content after feedings, and active and alert behavior during awake periods. Your baby's pediatrician will track growth on a growth chart, and steady progression along a percentile curve is more meaningful than the specific percentile.
How do I store and use pumped breast milk safely?
Freshly pumped breast milk can be stored at room temperature for up to 4 hours, in the refrigerator for up to 4 days, in a freezer compartment for 2 weeks, or in a deep freeze at 0°F for up to 12 months (6 months is optimal for quality). To use frozen milk, thaw it overnight in the refrigerator or by holding the container under warm running water. Do not microwave breast milk as it creates hot spots and destroys beneficial antibodies. Once thawed, use within 24 hours and do not refreeze. Label all stored milk with the date pumped.
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