How many wet nappies should a newborn have?

In the first few weeks, nappies stop being a chore and start being data. If you're breastfeeding you can't see how much milk your baby is taking, and even with bottles it's hard to know whether it's enough. Wet nappies are the simplest signal you've got — what goes in comes out.

Here's what to expect, day by day.

That's the headline. The detail matters too, so let's go through it.

Day by day, in the first week

After the first week or two, most babies settle at around six to eight properly wet nappies a day. You'll likely be doing more nappy changes than that in total — somewhere between eight and twelve, once you count the dirty ones — but it's the wet count that tells you about feeding.

What actually counts as a "wet nappy"?

This trips up almost every new parent, because modern disposables are extremely good at their job. A nappy can hold a meaningful amount of wee and still feel more or less dry to the touch.

Two ways to calibrate yourself:

• The teaspoon test. Pour two to four teaspoons of water into a clean, unused nappy and feel the weight. That's roughly what a properly wet nappy feels like. Do it once and you'll never wonder again.
• Use the wetness indicator. Many brands print a stripe down the front that changes colour when it's wet. Not perfect, but useful at 3am when your judgement is not at its sharpest.

A nappy with any amount of wee in it counts as wet. But from day five, you're specifically counting the heavy ones — six damp-ish nappies isn't the same thing.

What colour should it be?

Pale yellow, or nearly colourless. Dark yellow wee can be a sign your baby needs more milk, and it's worth mentioning to your midwife or health visitor. Strong-smelling wee is also worth flagging.

What about the orange or pink stains?

In the first two or three days, you might open a nappy and find a rusty pink, orange or brick-red powdery stain. This is alarming the first time you see it, and it looks disconcertingly like blood.

These are urates — harmless crystals in concentrated newborn wee. They're normal in the first few days while your milk is coming in. If you're still seeing them after about day three or four, mention it to your midwife, as it can suggest your baby isn't getting quite enough milk yet.

Don't forget the dirty nappies

Wet nappies are half the picture. Dirty nappies tell you about milk transfer just as clearly, and they change fast in the first week:

• Days 1–2: At least one nappy with meconium — sticky, tarry, greenish-black. It doesn't look like poo. It's meant to look like that.
• Days 3–4: At least two a day, changing colour towards green-brown as the meconium clears.
• Day 5 onwards: At least two a day, yellow, soft and often quite watery. For a breastfed baby it's usually loose and seedy; for a formula-fed baby it tends to be thicker, more like paste.

A rough size guide for those early dirty nappies: at least the area of a £2 coin. Anything much smaller, or fewer than two a day in the first few weeks, is worth raising.

One thing that surprises people later: after about six weeks, some exclusively breastfed babies go several days without a poo. If they're feeding well, gaining weight and otherwise happy, that's normal — but check with your health visitor rather than guessing.

When to speak to a midwife, health visitor or GP

None of these automatically mean something is wrong. Very often the answer is a small adjustment to positioning, latch or feed frequency. But low output is the earliest signal that a baby isn't getting enough milk, and it is much easier to fix early than late. Nobody will think you're being dramatic — this is exactly what your midwife and health visitor are there for.

Why keeping count is harder than it sounds

The advice above is simple. Following it on three hours of broken sleep, across two parents who are rarely awake at the same time, is not.

The nappy count only works as a signal if it's complete. If you changed one at 2am and your partner changed one at 5am and neither of you wrote it down, by lunchtime you're genuinely unsure whether today's total is four or six — and that's the difference between "all fine" and "call the midwife." Most parents end up either texting each other every few hours or reconstructing the day from memory at the health visitor appointment.

The fix is having one shared list rather than two half-remembered ones. However you do it — a scrap of paper on the changing table, a note on the fridge, or an app you both log into — the thing that matters is that both of you are writing to the same place.

Related: How much should a newborn sleep?

Sources: NHS infant feeding and dehydration guidance, and the UNICEF UK Baby Friendly Initiative breastfeeding assessment tools.

This article is general information, not medical advice. Every baby is different. If you're worried about your baby's feeding or output, contact your midwife, health visitor or GP — or call 111 out of hours.