How much sleep does a baby need in 24 hours?
Updated: Sep 25
Somebody will have told you a number by now. A chart in a book, a comment at a baby group, a screenshot doing the rounds in the WhatsApp group. Fourteen hours. Fifteen. Twelve and a half, if you count that twenty minutes in the pram.
Then you count up your own baby's day and it comes out nowhere near it, and the evening gets a bit heavier than it needed to be.
Here is the honest version.
There is a range, and it is wide on purpose
The National Sleep Foundation brought together an expert panel to review the evidence and agree recommended ranges by age. These are total sleep across the whole 24 hours, naps included.
Newborns, 0 to 3 months: 14 to 17 hours
Infants, 4 to 11 months: 12 to 15 hours
Toddlers, 1 to 2 years: 11 to 14 hours
The panel went further, and this part rarely gets quoted. Alongside the recommended range they set out hours that may be appropriate for some individuals. For infants that is as little as 10 to 11 hours, or as much as 16 to 18. Their own recommendations acknowledge, in writing, that healthy babies fall outside the headline range.
Look at the width. Three hours between the top and bottom of the recommended range for infants, and wider still once you include what may be appropriate. Two babies the same age, both entirely healthy, can be hours apart and both be exactly where they should be.
The number that matters is your baby's, and you already have it
Your baby has their own figure, and it sits somewhere inside that range. The only way to find it is to look at what they actually do across a stretch of days. That is a slightly annoying answer when you are tired and want a target. But it is the useful one, because once you know your own baby's number, most of the anxiety around it goes away.
A week is usually enough. Not a perfect week, either. A normal one, with a bad night in it and an afternoon where nothing went to plan. Logging that week in Littles is free, and you can read the days back yourself. If you would like the working out done for you, the analysis screens in Littles premium calculate your baby's own 24 hour sleep needs from their logged days once there is a week of data, rather than from an average of other people's. No prediction, no algorithm deciding what they should have done.
Why a single day tells you almost nothing
If you have ever looked at one bad day and concluded something is wrong, you are in enormous company. One day is noise. Babies have days where they sleep two hours less than usual and days where they sleep two hours more, and neither is a trend. Teeth, a cold coming, a growth spurt, a day out, a room that was slightly too warm. Any of it moves the numbers.
Across seven days, the noise flattens out and the shape appears. That shape is the thing worth knowing.
What actually shifts the total
The long nap. A three hour afternoon nap feels like a gift at the time. Sometimes it is. Sometimes it quietly borrows from bedtime, and the evening turns into a fight nobody understands.
The very early or very late start. A 5:10am wake and a 7:15am wake produce two completely different days, and the difference shows up in the total.
The timing of the last feed. Feeding and sleeping are not separate systems, even though most advice treats them that way. If you are tracking feeds as well, the connection tends to be visible within a fortnight.
Whatever is going on that week. Illness, a house move, a new room, a nursery settling-in week. Real life is an input, not an interruption.
What to do with the number once you have it
Less than you would think, and that is the point. Knowing your baby sleeps around 13 hours across 24 does not come with a schedule attached. What it gives you is a way of reading your own days. If you know the total is roughly steady, then a short nap stops being a problem and becomes a redistribution. The sleep went somewhere else.
It also gives you something concrete for the conversations that actually matter. If you speak to your health visitor, or you work with a sleep consultant, arriving with a real record beats reconstructing last week from memory at a kitchen table. Most parents cannot remember what happened on Tuesday, because most parents are exhausted. That is not a character flaw.
When to speak to someone
Tracking is for noticing, not for diagnosing. Please speak to your GP or health visitor if:
you are worried about your baby's weight gain or feeding
your baby seems more sleepy than usual, or unwell
sleep has changed suddenly and sharply with no obvious reason
you are struggling, in any way, with how you are feeling
That last one is not a lesser item on the list. Sleep deprivation is hard on adults, and how you are doing matters as much as the numbers on the screen.
The NHS says to call 999 or go to A&E if your baby is difficult to wake or cannot be woken. You know your baby best, so if something feels wrong, it is always fine to get them checked.
The short version
Your baby's total sleep sits somewhere in a wide range, and the range is wide because babies are different. Even the National Sleep Foundation's own recommendations allow for healthy babies outside it. A chart cannot tell you where your baby sits. Their own week can.
That is the whole reason Littles exists. There is no AI in it, nothing predicting, nothing telling you what should have happened. Just your baby's real days, laid out clearly enough to read.
Littles is free to download, and logging feeds, sleep and nappies stays free for as long as you want it. Two taps starts a timer, which is about all anyone can manage at 2:47am.
Your baby's own 24 hour sleep needs, and the rest of the analysis screens, are part of premium. Two weeks free to try, then £6.99 a month or £50 a year.
Sources: National Sleep Foundation sleep duration recommendations (Hirshkowitz et al, Sleep Health, 2015). NHS guidance on when to get urgent help for your baby.
Related reading: Why the sleep chart doesn't match your baby
