Tools · Baby
Wet & Dirty Diaper Checker: How Many Wet Diapers a Day?
Enter your baby's age in days and the wet and dirty diapers from the last 24 hours to see how they compare with the NHS and AAP figures for breastfed and formula-fed babies.
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This article is for general information and is not a substitute for professional medical advice. Always consult your pediatrician or doctor about your child.
Sources: WHO, CDC, AAP and NHS guidance. Recommendations differ between countries — for local advice see the NHS or CDC.
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The day of birth counts as day 1.
Enter your baby's age in days (or the birth date) and the number of wet and dirty diapers in the last 24 hours.
If you are worried, contact your doctor, health visitor or midwife. The NHS says to ask for an urgent GP appointment or get help from NHS 111 (UK) if a baby has fewer wet diapers than usual, seems drowsy, has few or no tears when crying, or has a soft spot on the head that sinks inwards, and to call NHS 111 if a baby stops breast or bottle feeding while ill. Outside the UK, call your local doctor.
A comparison with published figures, not a diagnosis. If your baby was born early or is unwell, your midwife or doctor will tell you which figures apply.
How to use the checker
- Enter your baby's age in days, or pick the birth date and the age is filled in for you. The day of birth counts as day 1.
- Count the wet and dirty diapers over the last 24 hours and enter both numbers. Zero is a valid answer.
- Choose how your baby is fed. The poo figures differ for breastfed and formula-fed babies.
- Read the two cards. Each says whether the count is within the usual range, fewer than the usual range, or that the sources give no fixed figure for that age.
Everything is worked out on your device and nothing is stored. For a printable week grid, see the diaper and feed tracker.
The figures the checker uses
What the health sources say (reference points, not a pass or fail)
- Wet diapers, first 48 hours: NHS: a breastfed baby is likely to have only 2 or 3 wet diapers.
- Wet diapers, days 3 and 4: NHS: wet diapers should then become more frequent. No number is given.
- Wet diapers, day 5 onwards: NHS: at least 6 heavy, wet diapers every 24 hours (breastfed). AAP: 6 or more a day by 5 to 7 days old. NHS (formula-fed): around 6 a day from a few days after the birth.
- Poos, breastfed: NHS: at least 2 soft, yellow poos a day from the fourth day, for the first few weeks. AAP: 1 or 2 a day on days 1 and 2 (blackish, tarry), at least 2 on days 3 and 4, and at least 3 to 4 by 5 to 7 days old.
- Poos, formula-fed: NHS: dark, sticky meconium for the first day or two, then pale yellow or yellowish brown poo within the first week, and at least 1 poo a day.
- Combination feeding: the NHS gives no separate figure. This tool uses the breastfed figures for wet diapers and the lower, formula-fed figure for poos.
The poo figures are applied up to day 28 because the NHS wording is "for the first few weeks"; after that the tool shows no poo figure. Counts over a single day swing a lot, so one low day is a reason to keep counting and to ask, not a result.
Related: Is my baby getting enough milk? · Baby poop color guide · Printable diaper and feed tracker
Frequently asked questions
How many wet diapers should a newborn have?
The NHS says that in the first 48 hours a breastfed baby is likely to have only 2 or 3 wet diapers. Wet diapers should then become more frequent, with at least 6 heavy, wet diapers every 24 hours from day 5 onwards. The AAP says 6 or more wet diapers a day by 5 to 7 days old. For a formula-fed baby the NHS says around 6 wet diapers a day from a few days after the birth. The NHS and AAP pages give no number for days 3 and 4.
How many dirty diapers (poos) should a baby have a day?
The NHS says a breastfed baby should have at least 2 soft, yellow poos a day from the fourth day, for the first few weeks, and that a formula-fed baby should have at least 1 poo a day. The AAP adds 1 or 2 poos a day on days 1 and 2 (blackish and tarry), at least 2 on days 3 and 4, and at least 3 to 4 by 5 to 7 days old. These are the figures the checker uses.
How often does a baby wee?
Neither the NHS nor the AAP page used here gives a gap in hours between wees. Both give a count over 24 hours instead: at least 6 heavy, wet diapers a day from day 5 onwards for a breastfed baby (NHS), and 6 or more by 5 to 7 days old (AAP). That is why this checker asks for the number of wet diapers in the last 24 hours.
My baby has not had a wet diaper for 12 hours. Is that a problem?
The NHS and AAP pages used here do not name a number of hours, so this page cannot give one either. What the NHS does say is that fewer wet diapers than usual, being drowsy, few or no tears when crying, or a sunken soft spot on the head can be signs of dehydration, and that you should ask for an urgent GP appointment or get help from NHS 111 (UK) if you see them. If you are worried, do not wait for a number: contact your doctor, health visitor or midwife.
How many wet diapers should a 3-month-old have?
The NHS and AAP pages used here do not give a separate figure for a 3-month-old. The NHS wording is 'from day 5 onwards', with no upper age, and for formula 'around 6 a day', so this checker keeps using 6 or more for older babies and says so on the result. For the daily number of poos the pages give figures for the first few weeks only, so the tool shows no figure for poos after day 28. Ask your health visitor or doctor what is usual for your baby.
How can I tell if a disposable diaper is wet?
The NHS says it can be hard to tell. To get an idea, take an unused diaper and add 2 to 4 tablespoons of water. This shows what a wet diaper looks and feels like. The NHS formula page also says diapers should be wet with clear or pale yellow urine, or feel heavy.
Sources: NHS: Breastfeeding: is my baby getting enough milk? (page last reviewed 30 April 2026) · NHS: Formula milk: common questions (page last reviewed 8 September 2023) · NHS Best Start in Life: Milk supply · AAP HealthyChildren.org: How to Tell if Your Breastfed Baby is Getting Enough Milk (last updated 13 January 2025) · NHS: Dehydration (page last reviewed 1 May 2026) · NHS: Diarrhoea and vomiting (page last reviewed 21 December 2023)
Stop counting diapers from memory. Whispie logs wet and dirty diapers in one tap and shows today's totals, for free, so the number for the last 24 hours is already there when you need it.
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