Is my newborn eating enough? How to actually tell

Nobody warns you that the hardest part of feeding a newborn is the not knowing. A bottle has markings. A breast does not. So you sit there at 2am with a baby who fed forty minutes ago and is rooting again, and the question arrives: is any of this actually working?

Here's the reassuring part. You don't need to measure millilitres, because your baby is already producing the evidence — several times a day, in a nappy.

What goes in comes out

Output is the most practical daily proof that intake is enough.

The NHS sets out a clear pattern: in the first 48 hours your baby is likely to have only two or three wet nappies, and from day five onwards you should see at least six heavy, wet nappies every 24 hours. Hong Kong's Family Health Service puts the same milestone slightly differently — at least one to two wet nappies on days one and two, three to four by days three and four, and five to six heavy ones from day five. Either way, the shape of it is the same: the count climbs steadily through the first week and then holds.

Dirty nappies matter just as much. From about day four, expect at least two soft, yellow poos a day, each roughly the size of a £2 coin — around two to three centimetres across — for the first few weeks. Before that, you'll see the black, tarry meconium shift through dark green to yellow. That colour journey is itself a sign that milk is moving through.

A practical tip from the NHS if you can't tell whether a disposable nappy is wet: pour two to four tablespoons of water into a clean one. Now you know what "wet" feels like in your hand.

Weight: the other hard number

It's normal for babies to lose some birth weight in the first three to four days. That dip frightens a lot of parents, and it shouldn't — it's expected.

What matters is what happens next. Your baby should gain weight steadily after those first few days, and the Family Health Service expects birth weight to be regained by around one to two weeks. That's the number your midwife, health visitor, or Maternal and Child Health Centre nurse is tracking at weigh-ins, and it's the single most reliable indicator you have.

What your baby's behaviour tells you

Beyond nappies and scales, there are softer signals worth learning to read:

• During the feed. Your baby is calm and relaxed rather than fighting the breast or bottle. You'll notice rapid sucks at first, then deeper sucks with pauses and audible swallows.
• Their cheeks. Rounded, not hollow, while they're sucking.
• After the feed. Content and satisfied after most feeds. Not every single one — newborns are not machines — but most.
• If you're breastfeeding. You shouldn't feel pain in your breasts or nipples during a feed, though the first few sucks may feel strong. Pain is a sign to get your latch looked at, not a sign to grit your teeth.

Feeding often is not a red flag

This is the misunderstanding that causes the most unnecessary worry. Feeding constantly is usually a sign of a newborn behaving like a newborn, not a sign of failing supply.

The Family Health Service is direct about the schedule question: feed at least three to four times on the first day, and usually at least eight times a day from day two, recognising your baby's early hunger cues rather than restricting the schedule or the amount. It also advises against topping up with water, glucose water, or formula unless there's a medical reason to.

If the round-the-clock feeding is happening in bunched, back-to-back sessions — especially in the evening — that has a name and it's normal. Our guide to cluster feeding covers what's behind it.

When to ask for help today

Don't sit on a worry overnight. Speak to your midwife, health visitor, doctor, or Maternal and Child Health Centre if:

• The wet nappies are going down rather than up, or you're not reaching those daily counts
• Your baby hasn't regained birth weight by around two weeks, or is losing weight after the first few days
• The urine looks dark rather than pale yellow or clear, or you notice brick-red or orange staining in the nappy
• Your baby is very sleepy, hard to wake for feeds, or too exhausted to finish one
• Feeding hurts, or your baby can't stay attached
• Your baby seems floppy, has fewer wet nappies alongside a fever, or simply seems off to you

That last one counts. Asking early is the point — the NHS's own advice on feeding worries is explicitly to ask for help early rather than wait and see.

Sources

• NHS — Breastfeeding: is my baby getting enough milk?
• Family Health Service, Hong Kong — Breastfeeding: for newborn babies

This article is general guidance and isn't a substitute for advice from your own doctor, midwife, or health visitor.

For more on the early weeks, browse our feeding guides and our newborn guides. If the constant feeding is wearing you thin, letting go of mom guilt may help you be kinder to yourself.

Simone can help you make sense of your own baby's pattern — count the nappies with you, and tell you plainly when something is worth a call.