Newborn Feeding Calculator: How Much Milk Does Your Baby Need?
New parents frequently worry about whether their baby is getting enough milk. This calculator provides evidence-based guidelines for formula and expressed breast milk volumes based on your baby's weight — removing the guesswork from one of the most common new-parent concerns.
The Feeding Formula
Daily Volume = Baby's Weight (kg) × 150 ml
Amount per Feed = Daily Volume ÷ Number of Feeds
Worked Example
Baby weight: 4 kg. 8 feeds per day.
Daily volume = 4 × 150 = 600 ml
Per feed = 600 ÷ 8 = 75 ml per feed
Calculate your baby's feed amounts with our Newborn Feeding Calculator.
Feeding Guidelines by Age
| Age | Feeds/Day | Volume per Feed |
|---|
| 0–2 weeks | 8–12 | 45–90 ml |
| 2–6 weeks | 7–9 | 90–120 ml |
| 6 weeks–3 months | 6–8 | 120–150 ml |
| 3–6 months | 5–7 | 150–180 ml |
Signs Your Baby Is Getting Enough
- Wet nappies: 6+ wet nappies per day after day 4–5 of life
- Regaining birth weight: Most babies regain birth weight by day 10–14
- Contentment between feeds: Baby seems satisfied after feeding, not constantly rooting
- Steady weight gain: Approximately 150–200g per week in the first few months
Breastfeeding Note
For exclusively breastfed babies, you cannot measure volume directly. The same nappy count and weight gain indicators apply. Frequent feeding (8–12 times in 24 hours in the newborn period) is normal and helps establish milk supply. If concerned about supply or intake, a lactation consultant and weighted feed assessment are available at most maternity units.
Practical Tips
Feed on demand, not by the clock. Hunger cues — rooting, sucking hands, turning head — are more reliable feeding guides than timed schedules, especially in the early weeks.
Do not force the baby to finish a bottle. Overfeeding formula-fed babies is associated with obesity risk. Let the baby stop when satisfied.
Warm milk to body temperature. Test on your wrist — should feel neutral, neither warm nor cool.
Final Thoughts
Knowing your baby's approximate feeding needs reduces anxiety and helps ensure adequate nutrition during the critical first months of life.
Calculate your baby's feed volumes with our free Newborn Feeding Calculator.
Always follow your healthcare provider's individual guidance for your baby's specific feeding needs.