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About this tool
Estimate a newborn's daily and per-feed millilitres from weight, day of life and feeds per day using standard mL/kg/day guidance.
This calculator estimates how much milk a term newborn takes in 24 hours and at each feed, using the standard paediatric rule of weight in kilograms multiplied by a daily intake in mL/kg/day, then divided by the number of feeds. It follows the usual first-week ramp — about 60 mL/kg on day 1 rising to 150 mL/kg by day 7 — and settles at roughly 150 mL/kg/day (working range 120-180) for a term infant under six months. It is a planning and sanity-check figure for bottle or expressed feeds, not a prescription.
Open Newborn Feeding Volume Calculator on AltFTool — it loads instantly in your browser.
Enter the values you already know.
Fine-tune the options to match your scenario.
Read the result and use it in your planning or reporting.
Uses the first-week ramp instead of one flat number for every newborn.
Shows the bottle size and the 24-hour total side by side, in mL and fl oz.
Flags feeds above newborn stomach capacity and the 960 mL daily ceiling.
Divide the daily requirement by the number of feeds: a 3.5 kg baby past the first week needs about 150 mL/kg/day, so 525 mL in 24 hours, or roughly 65 mL per feed across eight feeds. In the first week the daily figure is lower, starting near 60 mL/kg on day 1.
It is the standard maintenance intake for a healthy term infant under six months: multiply the baby's weight in kilograms by 150 to get the millilitres needed in 24 hours. The accepted working range is about 120-180 mL/kg/day, and preterm or unwell babies are fed to a plan set by their medical team instead.
About 5-7 mL on day 1 — roughly a cherry — rising to 22-27 mL by day 3, 45-60 mL by day 7 and 80-150 mL by one month. That is why very early feeds are small and frequent, and why a large calculated per-feed volume in the first days usually means the feeds should be split up.
No. Breastfed babies feed to appetite and intake is not measured in millilitres — feeding is judged by wet nappies, stool pattern and weight gain. The calculator is useful for bottle or expressed feeds, and for understanding the scale of a prescribed volume. Any concern about intake or weight gain should go to a paediatrician, midwife or lactation consultant.
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