Data
What sleep logs from about 403,000 babies show. Every baby is different, so these ranges show what's common, not what's right.
From families who use the app, so it may not represent your baby.
How much do babies sleep?
Babies sleep a little less as they grow, and most of the drop is naps: the night stays about the same.
Total sleep by age
For a typical baby, total sleep falls from about 14 h 40 min a day at 3 months to about 12 h 25 min at 18 months, and naps account for about 2 hours of that drop.
- Night, bedtime to morning wake-up
- Naps
Each column is a typical baby's night, from bedtime to morning wake-up, with a typical baby's naps on top. The night includes any time awake in it. The bands behind the columns show total sleep for half of babies (the inner band) and 9 in 10 babies (the wider band). Naps go from 25% of all sleep at 3 months to 14% at 18 months, so sleep is moving into the night.
How much babies nap
Babies the same age nap very different amounts: at 6 months, most nap about 2 h to 3 h 45 min a day.
Naps a day is all of a day's naps added up.
Here a disrupted stretch is defined as the total sleep an hour or more above or below the baby's usual over the previous two weeks, for at least three days in a row. It can only count days a parent logged in full, and parents log fewer full days during an illness or a trip, so stretches like those are probably undercounted. We found that about 8% of days fall in a disrupted stretch.
When do naps drop?
Babies go from four or more naps a day at 3 months to one nap somewhere in the second year, and each step comes at a different age for different babies.
How many naps a day, by age
Each column splits babies' days by how many naps they took.
- 1 nap
- 2 naps
- 3 naps
- 4 or more naps
Share of days at each nap count, each baby counted once, so every column adds up to 100%. Days with no nap recorded are left out: before 18 months they are far more likely to be unrecorded than nap-free.
When each nap goes
A typical baby drops to three naps at about 6 months, to two at about 9 and to one at about 14.
A baby has moved when it starts a run of 7 or more days at the lower count, so these ages are a little later than when a parent would first see the change. Each range is 9 in 10 of the babies seen to make that move. Two years of days, October 2024 to September 2026, because a move takes a long run of days to see.
How long are naps?
Later naps in the day tend to be shorter, and the stretch from the last nap to bedtime grows as babies grow.
How long each nap lasts
Later naps are shorter: at 9 months the third nap lasts about 30 to 70 minutes for most babies, against about 40 to 100 for the first.
Naps in the order they started that day, each baby counted once as its own average for that nap. A nap is shown at an age when at least 1 baby in 20 has it.
From the last nap to bedtime
At 9 months, most babies go to bed about 3 h 5 min to 5 h 10 min after their last nap ends.
For a typical baby, the stretch grows from about 2 h 15 min at 3 months to about 6 h 15 min at 18, and the last nap itself from about 50 minutes to about 1 h 35 min. The app doesn't record how long a baby takes to fall asleep, so this can't show whether the last nap makes settling harder.
On days when a baby's last nap ended later than usual, bedtime came a little later too: about 18 minutes for each hour later the nap ended. A longer last nap, ending at the usual time, moved bedtime by about 5 minutes an hour.
When do babies go to bed and wake up?
Bedtime and wake-up hardly change with age, but they differ by hours between families.
Bedtime by age
A typical baby goes to bed between about 8:10 and 8:40 pm, at every age. At 9 months, most go to bed between about 7:00 and 10:15 pm.
Each baby counts once, as its usual bedtime: its average over the month.
Morning wake-up by age
A typical baby wakes between about 7:10 and 7:35 am, at every age. At 9 months, most wake between about 5:55 and 8:55 am.
At 9 months, about 1 morning in 10 starts before 6 am, and about 1 in 30 before 5:30 am.
Each baby counts once, as its usual wake-up: its average over the month.
When babies went to bed later than they usually did, they woke up only a little later the next morning: about six to seven minutes later for each hour of later bedtime. So a later bedtime mostly meant a shorter night, and the next day's naps did not make up the difference.
When the later bedtimes went on for a week, the mornings did start to drift: by the seventh night, bedtime was about an hour and a half later than usual and wake-up about 40 minutes later, and the night was still about an hour shorter.
What about nights?
Babies have fewer recorded night wakings at 12 months than at 3 months, but many wakings are never recorded.
Parent-recorded night wakings by age
At 3 months, parents of most babies record up to about 4 wakings a night. By 12 months, it's up to about 2.
The shading starts at zero because many babies have nights with no recorded waking.
Parent-recorded night wakings are the wakings a parent entered in the app overnight: by hand, with the app's timer, or by telling the app's chat. Nothing is recorded by a camera or a sensor, and the app doesn't know whether a parent went in to help. Many wakings are never recorded, so a night with no recorded wakings doesn't mean the baby didn't wake. Each baby counts once, as its own average over the month. Only families who record wakings are included: babies with at least one recorded waking in the year. 6% of babies at 3 months and 41% at 18 months had no waking recorded all month.
Quick night feeds often go unrecorded, so real nights have more wakings than this shows. Waking often is expected in young babies, and night weaning depends on growth and feeding rather than on a chart.
About this data
Averages describe a lot of babies and no baby in particular. If yours falls outside these ranges, that's usually still normal, and if something worries you, your doctor is the right person to ask. Some things are always worth reaching out to your healthcare provider about: snoring or pauses in breathing, a young infant who is hard to wake, poor weight gain, or persistent sleep trouble affecting the whole family.
403,251 babies aged 3 to 18 months, logged by parents between October 2025 and September 2026. They're from 186 countries, most often Germany (22%), Brazil (15%) and France (9%), and they're families who use the app, not a random sample.
Ages are counted from birth, not corrected for babies born early.
The line is the median, so half of babies are above it and half below. The inner band holds the middle half of babies, so by design half sit outside it, and a baby just outside it isn't unusual. The wider band holds 9 in 10 babies. On these charts, when we say ‘most babies’ we mean 9 in 10.
A day counts when a parent logged the morning wake-up, bedtime and every nap, at least one. Each baby counts once per month of age, averaged over at least 7 such days, and unsettled weeks are included. The night runs from bedtime to the next morning's wake-up.
Every number is aggregated from Napper's data, and no baby or family can be identified.
The line is a typical baby. Most babies fall somewhere in the shading, so being above or below the line is completely normal.