Free feeding tool

Infant milk calculator

Estimate how much breast milk, formula, or a combination your baby may need in 24 hours and at each feeding.

This tool is educational and does not replace your pediatrician's guidance, weight checks, or an individualized feeding plan.

How it estimates

The calculation uses age- and sex-based infant energy requirements published by FAO/WHO/UNU and assumes milk at about 20 kcal per ounce.

View the FAO/WHO/UNU source

Calculator

Three quick details give you a daily estimate and a per-feeding estimate.

1

Enter baby's weight

Use the most recent weight you have from home or a visit.

Weight unit

Enter a weight to see the conversion here.

2

Add age and sex

These choose the energy requirement table used by the estimate.

3

Choose feedings per day

This divides the daily estimate into a bottle or feeding amount.

Use with feeding cues

Babies are usually fed on demand. This estimate can help with planning bottles, pumping, or supplementing, but hunger cues, satisfaction cues, diapers, and growth matter more than a single number.

When to ask for help

Contact your baby's medical team urgently for poor feeding, lethargy, fewer wet diapers than expected, jaundice concerns, dehydration concerns, or weight gain that is not on track.

Special situations

Preterm babies and medically fragile infants may need fortified milk or special formula. This calculator does not estimate those needs.

Need a feeding plan?

Get support that fits your baby

Liz can help with weighted feeds, bottle planning, pumping, latch, supply worries, and combo-feeding decisions.

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