Baby Formula Calculator
Enter your baby weight and feedings per day to see daily ounces and the amount per bottle.
| Weight | Per day | Per 8 feeds |
|---|---|---|
| 8 lb | 20 oz | 2.5 oz |
| 10 lb | 25 oz | 3.1 oz |
| 12 lb | 30 oz | 3.8 oz |
| 15 lb | 32 oz | 4.0 oz |
| 18 lb | 32 oz | 4.0 oz |
| 22 lb | 32 oz | 4.0 oz |
The 2.5 ounce rule
A simple guide is about 2.5 ounces of formula per pound of body weight per day, up to roughly 32 ounces. That total spread across the day gives the amount for each bottle. It is a starting point, not a strict target.
Follow hunger cues
Babies eat more on growth-spurt days and less when they are off. Watch for rooting, hand-to-mouth, and fussiness as hunger signs, and let your baby turn away when full. A consistent gain in weight is the real check.
When to ask your pediatrician
Talk to your pediatrician about amounts if your baby is a newborn, premature, or not gaining well. Every baby is different, and this calculator is a general guide, not medical advice.
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Questions about this calculator
How much formula should my baby drink?
A common guide is about 2.5 ounces per pound of body weight per day, up to roughly 32 ounces. A 12-pound baby takes about 30 ounces across the day.
How many ounces should a newborn drink?
Newborns often take 1 to 2 ounces per feeding every two to three hours, working up to 2 to 3 ounces as they grow. Feed on hunger cues rather than a fixed schedule.
How often should I feed my baby formula?
Newborns feed 8 to 12 times a day, older babies fewer times in larger bottles. Let appetite and weight gain guide the pace.
Can I feed too much formula?
Overfeeding is possible if you push past fullness. Let your baby stop when they turn away, and follow your pediatrician on total amounts.
When do babies drink less formula?
Intake levels off and then drops as solid foods take over, usually in the second half of the first year. Formula stays the main drink through 12 months.
Should I wake my baby to feed?
In the early weeks, your pediatrician may advise waking a sleepy newborn to feed. After that, most babies feed well on their own schedule.