How this calculator works
The AAP describes an average of 2.5 US fluid ounces of formula per pound of body weight per day and a usual upper daily guide of about 32 US fluid ounces. This tool converts those units exactly; the article's metric equivalents are rounded. It displays the uncapped arithmetic and flags estimates above the guide instead of silently changing them. During the first week it shows only the AAP per-feed reference. The calculation is for term infants through about 6 months, not premature infants, specialised formula, tube feeding or individual medical needs. It calculates prepared formula volume, never powder or water ratios. The result is an estimate for information only and is not medical advice.
Formula
Daily prepared volume = weight(lb) × 2.5 US fl oz. Planned average per feed = daily volume / planned feed count. 1 lb = 0.45359237 kg; 1 US fl oz = 29.5735295625 mL.
Worked example
An 8 lb infant past the first week gives 20 US fl oz/day, or 591.47 mL. With 8 feeds, the arithmetic average is 73.93 mL per feed. A 10 lb infant gives 25 US fl oz/day, or 739.34 mL.
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Frequently asked questions
Does the average set a strict feeding schedule?
No. Bottle amounts vary, and babies should not be made to finish a bottle. Review feeding cues, wet diapers and growth with a clinician.
Why do the metric numbers differ slightly from 75 mL per pound?
The AAP rounds its metric equivalent. This page uses the exact US fluid-ounce conversion for consistent unit switching.
Can this tell me how much powder to use?
No. Always follow the product's preparation instructions. Changing the powder-to-water ratio can be harmful.