How much formula for a 17 lb 1 week old
| Daily totalcapped at the 32 oz ceiling, not 2.5 × weight | 32oz |
|---|---|
| Per feedacross 8–12 feeds a day | 2.7–4oz |
| Feeds per 24 hoursset by age, not by weight | 8–12 |
| Weight-based figureabove the ceiling — do not feed this much | 43oz |
| WHO 50th percentile at this agethis baby is +118% against it | 7.8 lb |
Notes
- 17 lb is past the point where the weight rule stops applying. 2.5 oz per pound would give 43 oz, but daily formula intake plateaus at about 32 oz regardless of size. Past that, formula displaces the iron and variety that solids are meant to provide, and most paediatric guidance says to stop adding rather than keep scaling.
- Before six months, formula is the entire diet and the daily total rises with weight. It stops rising at around six months and then declines as solids take over — which surprises most parents the first time.
- This is formula. A breastfed baby regulates intake by feeding to satiety and typically stays near 25 oz a day from one to six months with very little change, because breast milk composition shifts as the baby grows. Expressed milk given by bottle follows the breastfed pattern — roughly 1 to 1.5 oz per hour since the last feed — not the formula pattern.
- Volume is the least reliable signal that a baby is getting enough. Six or more wet nappies in 24 hours after the first week, steady weight gain along a curve, and relaxed behaviour at the end of a feed all say more than any number in ounces.
- Never dilute formula to stretch it and never concentrate it to add calories. The mixing ratio on the tin is a medical instruction — the electrolyte balance depends on it, and getting it wrong is dangerous in both directions.
The short answer
A 17 lb 1 week old on formula takes about 32 oz a day, split into 8–12 feeds of 2.7–4 oz each.
Where those two numbers come from
The daily total comes from weight: roughly 2.5 oz of formula per pound of body weight per 24 hours. The number of feeds comes from age.
That is why the two axes are separate. Two babies of the same weight at different ages take the same amount per day in a different number of sittings — a newborn in eight to twelve small feeds, a nine-month-old in three or four large ones.
The ceiling that does not move
The weight rule stops at about 32 oz a day. A 15 lb baby does not need 37 oz. Past the ceiling, formula displaces the iron and variety that solids are meant to start providing, and paediatric guidance is to stop adding rather than keep scaling.
Why the total falls after six months
Solids take over gradually from around six months. By ten months they supply roughly a third of energy needs, so daily formula declines.
A ten-month-old drinking less than a four-month-old is following the normal pattern, not falling behind it. This surprises most parents the first time, and it is the thing a chart organised by age alone tends to hide.
Breastfed babies do not work this way
Everything above is formula, where the volume is visible and countable.
A breastfed baby regulates intake by feeding to satiety and typically stays near 25 oz a day from one to six months, with very little change — because breast milk composition shifts as the baby grows rather than the volume rising. Expressed milk given by bottle follows the breastfed pattern, roughly 1 to 1.5 oz per hour since the last feed.
What tells you it is enough
Volume is the least reliable signal. Better ones: six or more wet nappies in 24 hours after the first week, steady weight gain along a curve rather than any particular percentile, and relaxed behaviour at the end of a feed.
A baby draining every bottle and immediately wanting more may simply be on a nipple that flows too fast to register fullness.
When to ring someone
Fewer than four wet nappies a day, feeds consistently under half these ranges for several days, or weight crossing downward through two percentile lines on the chart.
Never dilute formula to stretch it and never concentrate it to add calories. The mixing ratio on the tin is a medical instruction — the electrolyte balance depends on it, and getting it wrong is dangerous in both directions.
Nearby sizes
Read more
- Switching From Formula to Cow's Milk: At 12 Months, and Capped at 16–24 ozTwelve months, whole milk, and no more than 24 ounces a day. That last number is the one that matters, and it is the one nobody mentions.
- When Can a Baby Have Water? Not Before 6 Months, and Only Sips Until 12Water before six months is not merely unnecessary — it is unsafe, and the reason is a kidney that cannot yet dilute what it is given.
- How Many Ounces Should a Newborn Drink? 1–3 Per Feed, 8–12 Times a DayA newborn's stomach holds about a teaspoon on day one and an egg by day ten. That is why the first fortnight has its own numbers.
- How Many Ounces Should a 3-Month-Old Eat? 4–6 Per Feed, 24–32 a DayAge gets you a starting range. Weight gets you the actual number, and the two disagree often enough that it is worth knowing which one to trust.