Baby Bottle & Formula Calculator
Get a general daily formula guide based on your baby's age and weight, with an optional per-bottle planning estimate.
Calculate a formula guide
For healthy, full-term babies under 12 months. Enter baby's age range and current weight.
Please select baby's age range.
Please enter a weight between 2.5 kg and 20 kg.
Please enter a whole number between 1 and 20.
Important: This is a general guide, not a feeding prescription. Babies can need more or less. Follow your baby's hunger and fullness cues. If your baby was born premature, has a low birth weight or medical condition, or you are concerned about feeding, growth or wet nappies, seek advice from your GP, paediatrician or child and family health nurse.
The calculator does not save the information you enter.
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Your formula guide will appear hereEnter baby's age and weight, then select Calculate Formula Guide.General daily formula guide—
Baby's weight
Age range
Formula guide used by this calculator
This calculator uses the age-and-weight guide published by Australia's Pregnancy, Birth and Baby service, which references the Australian Infant Feeding Guidelines.
1–4 days30–60 mL per kg per day
5 days–3 months150 mL per kg per day
3–6 months120 mL per kg per day
6–12 months100 mL per kg per day
Learn more from Pregnancy, Birth and Baby and the NHMRC Infant Feeding Guidelines.
How to use the result
1
Use the daily figure as a general guideIt is not an amount your baby must finish. Individual feeding needs vary.
2
Let baby guide individual feedsIf you entered a bottle count, the per-bottle figure is simply the daily guide divided evenly for planning. Babies do not necessarily drink the same amount at every feed.
3
Prepare formula exactly as directedAlways follow the instructions on the formula container and use the scoop supplied. Do not alter the powder-to-water ratio to match this calculator.
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Baby Boy GiftsFrequently asked questions
Every baby is different. Australian guidance provides age-and-weight-based amounts as a general guide, but some babies need more and some need less. Follow your baby's hunger and fullness cues and seek professional advice if you are concerned.
The calculator multiplies the baby's weight by the Australian daily guide for the selected age range. For babies aged 1–4 days, it displays a range because the published guide is 30–60 mL per kg per day.
No. If you enter a bottle count, the per-bottle number is simply the daily guide divided evenly for planning. Babies can drink different amounts at different feeds, so follow their feeding cues.
There is no single correct number for every baby. Pregnancy, Birth and Baby says newborns generally have 6–8 feeds in 24 hours, while older babies from around 3 months are generally satisfied with around 5–6 bottles. Your baby's own feeding cues remain important.
No. Always prepare formula according to the manufacturer's instructions and use the scoop supplied with that formula. Do not add extra powder, extra water or partial scoops unless the manufacturer's instructions specifically direct you to do so.
This calculator is based on guidance for healthy, full-term babies of normal birth weight. Premature and low-birth-weight babies can have different needs, so seek specific advice from your baby's healthcare team.
Australian NHMRC guidance does not recommend animal milk, including cow's milk, as the main drink for infants under 12 months. If an infant is not breastfed or is partially breastfed, infant formula is the recommended alternative under 12 months.