How much formula does my baby need per day?

The AAP guideline is about 2.5 fl oz (74 mL) per pound of body weight per day. A 10 lb baby would need roughly 25 oz per day. Most babies need between 18–32 oz per day depending on age and size.

Does this calculator apply to newborns?

Yes, but newborns (0–2 weeks) start with very small amounts — typically 1–2 oz per feeding — and gradually increase. Use the age guidance shown alongside the weight-based result for the most accurate picture.

When should I stop formula and start solid foods?

The AAP recommends introducing solid foods around 6 months while continuing formula until at least 12 months. Formula should remain the primary nutrition source until 12 months.

What if my baby takes less than the calculated amount?

Appetite varies day to day. As long as your baby is gaining weight appropriately and has adequate wet diapers, slightly less than the calculated amount is usually fine. Consult your pediatrician if you are concerned.

How many feedings per day is normal?

Newborns typically feed 8–12 times per day. By 2–3 months most infants settle into 6–8 feedings. By 6 months, 4–6 feedings is common. The calculator supports 4 to 12 feedings per day.

Is this calculator a substitute for medical advice?

No. This tool provides estimates based on standard guidelines and is for reference only. Always consult your pediatrician for personalized feeding recommendations.

Infant Formula Intake Calculator

Enter your baby's weight and age to get daily and per-feeding formula amounts based on AAP guidelines.

Baby Details

Weight Unit

Baby's Weight (lb)

Typical range: 5–25 lb (2.3–11.3 kg)

Baby's Age

Feedings per Day

Enter your baby's weight above to see recommended formula amounts.

Summary

This calculator estimates the recommended daily formula intake for infants from birth to 12 months using the American Academy of Pediatrics (AAP) guideline of approximately 2.5 fl oz (74 mL) per pound of body weight per day. It divides the total by your chosen number of daily feedings to give a per-bottle amount. Results are a starting reference — always follow your pediatrician's guidance for your baby's individual needs.

How it works

Enter your baby's current weight in pounds or kilograms.
Select your baby's age range to see age-appropriate guidance.
Choose how many feedings per day your baby has.
The calculator multiplies weight (in lbs) by 2.5 oz to get the daily total.
The daily total is divided by the number of feedings for a per-bottle amount.
Results are displayed in both fluid ounces and milliliters.

Use cases

Estimate how much formula to prepare for a newborn.
Adjust formula amounts as your baby gains weight.
Compare oz-per-feeding across different feeding schedules.
Plan formula purchases based on daily consumption estimates.
Double-check that current feeding amounts are within normal ranges.

Frequently Asked Questions

Last updated: 2026-06-19 · Reviewed by Nham Vu