How Much Formula Does a Baby Need? Chart by Age and Weight (AAP and CDC)
Ounces per feeding and per day from the first week to 12 months, the 2½-ounces-per-pound rule, the 32-ounce ceiling, hunger and fullness cues, and when intake is worth a call to the pediatrician.
What parents should know
- Newborns usually feed 8 to 12 times in 24 hours (CDC).
- Daily total ≈ weight in pounds × 2.5 oz, capped around 32 oz (AAP).
- As solids increase after 6 months, formula gradually decreases (CDC).
- Babies getting less than about 32 oz of formula a day need vitamin D drops (CDC).
- Never water down formula or add extra powder; mix exactly as the label says (FDA).
Formula amounts by age
| Age | Per feeding (typical) | How often | Notes |
|---|---|---|---|
| First days | 1–2 oz (30–60 mL) | Every 2–3 hours, 8–12 feeds/day | Offer more if your baby shows hunger cues (CDC) |
| End of month 1 | 3–4 oz (90–120 mL) | Every 3–4 hours | Wake a newborn who sleeps more than 4–5 hours and misses feeds (AAP) |
| 2–4 months | About 4–6 oz | Every 3–4 hours | Many no longer need a middle-of-the-night feed once over about 12 lb (AAP) |
| 6 months | 6–8 oz (180–240 mL) | 4–5 feeds/day | Solids start around now (AAP) |
| 6–12 months | Up to about 8 oz | Formula or solids 5–6 times/day | Formula gradually decreases as solids increase (CDC) |
| 12 months | Switch to whole milk | With meals and snacks | Replace one bottle at a time (CDC) |
Formula amounts by weight
The AAP's rule of thumb is about 2½ ounces (75 mL) of formula per pound of body weight per day, with an upper limit of about 32 ounces (960 mL) in 24 hours (AAP). Divide the daily total by the number of feeds to estimate a bottle size.
| Baby's weight | Approximate daily formula | Example: 6 feeds/day |
|---|---|---|
| 6 lb | 15 oz | 2½ oz per bottle |
| 8 lb | 20 oz | 3–3½ oz per bottle |
| 10 lb | 25 oz | 4 oz per bottle |
| 12 lb | 30 oz | 5 oz per bottle |
| 13 lb and up | About 32 oz (ceiling) | Fewer, larger bottles; add solids from about 6 months |
Hunger and fullness cues
Babies regulate their intake from day to day, so the AAP advises letting your baby tell you when they've had enough (AAP). Responsive feeding means watching your baby, not the ounce marks.
Signs of hunger
- Rooting, turning toward the bottle, opening the mouth.
- Sucking on hands or fists, lip smacking.
- Fussing; crying is a late hunger sign.
- Draining the bottle and still smacking lips may mean they want more (AAP).
Signs of fullness
- Slowing down, turning away or closing the mouth.
- Becoming fidgety or easily distracted during the feed (AAP).
- Relaxed hands and body, falling asleep.
How to tell your baby is getting enough
The AAP stresses that no book or website can tell you exactly how much your own baby needs; your pediatrician tracks growth at each visit (AAP).
- Steady weight gain at checkups along their growth curve.
- Regular wet diapers, usually about 6 or more a day after the first week.
- Content and alert between feeds most of the time.
Mixing, storage and safety
- Measure exactly. Use the scoop that came with the can and the water amount on the label. Too much water can cause dangerous low sodium; too little can strain your baby's kidneys. See our formula measurement guide.
- Use safe water. Our water for baby formula guide covers tap, bottled and boiled water.
- Use prepared formula promptly. The CDC says to use prepared formula within 2 hours of preparation and within 1 hour once feeding starts; refrigerate made-ahead bottles and use them within 24 hours (CDC).
- Don't make homemade formula or use toddler milk for babies under 12 months (FDA).
- Vitamin D: babies taking less than about 32 oz of formula a day, or any breast milk, need vitamin D drops (CDC).
After 6 months: formula plus solids
Once solids start, many babies take a little less formula over time. CDC says most 6- to 12-month-olds have formula or solids about 5 to 6 times in 24 hours (CDC). Formula is still the main source of nutrition for much of this period, so don't cut bottles sharply just because your baby likes food.
At 12 months you can switch to plain whole cow's milk or a fortified unsweetened dairy alternative, one feeding at a time (CDC). Our how much milk should a 1-year-old drink guide covers the next step.
When to call the pediatrician
- Fewer wet diapers, a dry mouth, no tears when crying or a sunken soft spot (possible dehydration).
- Regularly taking far more than 32 oz a day, or much less than expected for their weight.
- Forceful or green vomiting, blood in stool, or spitting up that seems painful (see why babies spit up).
- Poor weight gain, or a newborn who is too sleepy to wake for feeds.
- A fever of 100.4°F (38°C) or higher in a baby under 3 months: call right away.
Frequently asked questions
How much formula should a newborn drink?
About 1 to 2 ounces every 2 to 3 hours in the first days, increasing to 3 to 4 ounces every 3 to 4 hours by the end of the first month.
How much formula should a 2-month-old drink?
Typically about 4 to 5 ounces every 3 to 4 hours, or roughly 2½ ounces per pound of body weight per day. Follow your baby's cues.
How much formula should a 6-month-old drink?
About 6 to 8 ounces at each of 4 or 5 feedings a day, alongside new solid foods.
What is the maximum amount of formula per day?
The AAP says most babies should average no more than about 32 ounces in 24 hours.
Can I add extra formula powder to help my baby sleep?
No. Always mix formula exactly as the label directs. Extra powder or extra water can make your baby sick.
Do formula-fed babies need vitamin D?
Babies taking about 32 ounces or more a day get enough from formula. Those taking less, or any breast milk, need vitamin D drops, per the CDC.
Keep reading
Sources
This guide was checked against the current guidance below. Medical and safety recommendations can change; use the linked source and your child's clinician for decisions specific to your family.