Newborn feed calculator
Newborn Feeding Calculator
The first weeks have their own math: tiny stomachs, 8–12 feeds a day, and amounts that change almost daily. This page explains how newborn feeding amounts ramp up from the first day through six weeks, and links into the calculator for a weight-based bottle target.
Quick answer
Measured bottle amounts depend on feeding type. CDC guidance for exclusively formula-fed newborns starts at 30–60 ml every 2–3 hours in the first days; expressed colostrum feeds may be smaller. Once feeding is established, weight and daily feed count can provide a rough bottle range.
Feeds per day
8-12 feeds
Frequent small feeds are normal. Ask your clinician if your newborn is difficult to wake or regularly misses feeds.
First days
30-60 ml formula
CDC and AAP guidance for exclusively formula-fed newborns; expressed colostrum bottles may be smaller.
From 2 weeks
150-180 ml/kg/day
Weight-based math takes over once feeding is established and birth weight is regained.
How to use this estimate
A simple routine.
- 01
Use your baby's most recent weight, not the birth weight, once they have been weighed at a checkup.
- 02
Enter the age in weeks so the calculator applies the newborn intake range.
- 03
Enter how many feeds your newborn takes in 24 hours, usually 8-12.
- 04
Treat the result as a starting range and let hunger and fullness cues set the actual amount.
Safety boundary
Call your pediatrician or midwife if your newborn has fewer than 6 wet diapers a day after day 5, has not regained birth weight by about two weeks, is unusually sleepy or hard to wake for feeds, or shows dehydration signs. Premature babies need an individualized plan, not a standard calculator.
Reference table
Newborn feeding amounts by age
| Range | Amount | Note |
|---|---|---|
| Day 1-2 | 30-60 ml formula | Expressed colostrum feeds may be smaller. Follow hunger cues and your care team's guidance. |
| Day 3-7 | 30-60 ml per feed | Milk comes in and volumes rise fast; expect 8-12 feeds across 24 hours. |
| Weeks 2-6 | Use weight + feed count | Once feeding is established, divide the daily weight-based estimate by the usual number of feeds. |
FAQ
Frequently asked.
01How much milk should a newborn drink according to the calculator?
It depends on feeding type, weight, age, and hunger cues. CDC guidance says an exclusively formula-fed newborn can start with 30-60 ml every 2-3 hours in the first days, while measured expressed-colostrum feeds may be smaller. After feeding is established, the calculator uses a weight-based daily range divided by the number of feeds as a rough planning estimate.
02Is the newborn calculation different for breastfed babies?
Babies nursing at the breast self-regulate and do not need measured volumes — frequency (8-12 feeds in 24 hours) and output (wet diapers, stools, weight gain) are the markers that matter. The weight-based numbers are most useful when a newborn takes expressed breast milk or formula from a bottle.
03When do newborn feeding amounts stop changing so fast?
By around two weeks, once birth weight is regained, most newborns settle into a steadier pattern where the weight-based daily total grows gradually with the baby. From there, re-running the calculator every couple of weeks keeps the bottle target current — newborns gain roughly 150-200 g per week.
Read next
Related paths.
How Much Milk Should a Newborn Drink?
Day-by-day newborn feeding amounts for the first month.
Open
First Six Weeks, Week by Week
Weekly volumes, growth spurts, and adequate-intake signs.
Open
Formula Feeding Calculator
Weight-based formula amounts from birth through 12 months.
Open
Premature Baby Feeding Calculator
Why preemies need an individualized feeding plan first.
Open
Trust & methodology
Sources and editorial review
These calculator landing pages use the same paper-trail approach as the main site: visible methodology, clear medical boundaries, and links to pediatric and public-health references.
Last sitewide review
June 11, 2026
Maintained by
Baby Milk Calculator editorial team
Editorial policy
Who writes the site, how sources are chosen, how updates and corrections are handled.
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How we calculate
The intake ranges, unit conversions, and guardrails behind every result.
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Corrections & contact
Send a question or correction to support@milkcalculator.org.
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Citations
Where the numbers come from.
- Amount and Schedule of Baby Formula Feedings
HealthyChildren.org / American Academy of Pediatrics
- How Much and How Often to Feed Infant Formula
CDC
- How Much and How Often to Breastfeed
CDC
- How Often To Breastfeed
HealthyChildren.org / American Academy of Pediatrics
- Signs Your Child Is Hungry or Full
CDC