How much milk does a newborn need? Week-by-week guide
During the first weeks of life, one of the most frequent doubts among mothers and fathers is to know if their baby is getting enough milk. Whether you're breastfeeding, pumping, or formula, understanding how much milk a newborn needs week to week can give you peace of mind and help you better respond to their hunger and fullness cues.
The amount of milk a newborn needs varies rapidly during the first few weeks.
What does the amount of milk a baby needs depend on?
Baby's age: feedings increase progressively in volume during the first few weeks.
Type of feeding: the frequency and volume vary between breastfeeding, mixed or artificial.
Hunger and satiety signals: each baby has their own rhythm, and it is key to observe it rather than follow exact figures.
Growth and weight: Babies in active growth may need more milk during certain times (growth spurts).
Gastric capacity: the newborn's stomach is small at birth and grows day by day.
Week-by-week guide: How much milk does a newborn need?
| Week | Volume | Daily feedings |
|---|---|---|
Day 1-2 | 5-10 ml | 8-12 |
Day 3-4 | 15-30 ml | 8-12 |
Day 5-7 | 30-60 ml | 8-10 |
Week 2 | 60-90 ml | 7-9 |
Week 3-4 | 75-120 ml | 6-8 |
Week 5-6 | 90-150 ml | 5-7 |
These figures are indicative and more relevant for bottle-feeders. In the case of on-demand breastfeeding, the most important thing is to observe signs of hunger (looking for the breast, sucking movements, restlessness) and satiety (slower sucking, falling asleep at the breast, rejecting more feedings).
According to the American Academy of Pediatrics, a breastfed baby does not need exact measurable amounts; Ideally, you should offer the breast on demand, even more than 12 times a day for the first few days.
How do I know if my baby is eating enough?
They wet between 5 and 6 diapers a day with clear urine.
They have frequent bowel movements (especially the first few days with breastfeeding).
They gain weight progressively, from the 4th to the 5th day.
They are active and alert in waking periods.
They latch well to the breast and suction is effective (if breastfeeding).
During the first few weeks, you should not obsess over the number of milliliters, but rather the frequency of feedings and the baby's signals.
What if he takes formula?
In the case of formula feeding, the quantities are calculated more accurately. According to the World Health Organization, a total daily intake of 150 ml per kilo of body weight per day can be estimated, divided into 6-8 doses.
However, every baby is unique. Some take less at certain feedings and more at others, and that's also normal if the overall rhythm is maintained and there are signs of well-being.
Growth spurts: more hunger, more feedings
Between week 2 and week 6, many babies go through growth spurts. These periods are characterized by:
- Breastfeed or bottle-feed more often
- Being more irritable or fussy
- Sleeping more or less than usual
During these days, it is key to continue offering on demand and trust that it is a passing phase. Breast milk production adapts quickly if the baby is allowed to breastfeed without restrictions.
Tips for breastfeeding mothers
Trust your body: breast milk adjusts to your baby's needs.
Watch for early hunger cues, don't wait for crying.
Seek professional help if there is pain, poor latch, or low weight gain.
Avoid comparing with other babies: each breastfeeding is unique.
Hydrate and rest, your well-being favors milk production.
Guidance information