The general formula to estimate how much infant formula a baby needs per day is: Amount of formula per day (in ounces or milliliters) = Baby's weight (in pounds or kilograms) × 2.5 ounces (or 75 mL) per pound (or 150 mL per kg) This means, on average, a baby should consume about 2.5 ounces of formula for every pound of their body weight daily. For example, if a baby weighs 8 pounds, they would need approximately 20 ounces of formula per day (8 × 2.5 = 20 ounces)

. More detailed guidance by age and weight includes:

• Newborns typically start with 1 to 2 ounces per feeding, about every 2-3 hours

• At around 2 months, babies usually consume about 4-5 ounces every 3-4 hours, totaling roughly 24-32 ounces per day

• By 6 months, they may drink 6-8 ounces about 4-5 times a day

A more precise calculation using metric units is:

• For babies 5 days to 3 months old: about 150 mL per kilogram of body weight per day.
• For 3-6 months old: about 120 mL/kg/day.
• For 6-12 months old: about 100 mL/kg/day

To find the amount per feeding, divide the total daily formula by the number of feedings per day. For example, if a baby needs 24 ounces per day and feeds 6 times, each feeding would be about 4 ounces

. This formula and schedule serve as a guideline; individual needs may vary based on the baby's appetite, growth, and health. It's important to watch for hunger and fullness cues and consult a healthcare provider for personalized advice