According to the NHS, newborns spend most of their time asleep, totaling between 8 and 18 hours in a 24 hour period; both ends of this range are normal. Newborn sleep occurs in short bouts around feeding, making uninterrupted night sleep uncommon in early weeks. From 4 to 12 months, the AAP endorsed guideline recommends 12 to 16 hours of total sleep daily, including naps.
How many hours does a newborn sleep?
The UK National Health Service (NHS) notes that newborns sleep significantly more hours than they spend awake. NHS Best Start in Life guidance explains that some newborns sleep about 8 hours in 24 hours while others sleep up to 18 hours, both being normal variations.
Avoid setting rigid sleep schedules for early infancy. The NHS emphasizes that sleep rhythms vary widely, with some babies sleeping in brief intervals and others taking longer naps. A Lullaby Trust survey cited by the NHS revealed that 59 percent of parents with babies under 12 months reported their child sleeps for less than 4 hours at a time, showing how common fragmented sleep is.
What should newborn sleep look like?
During early weeks, sleep is distributed evenly across day and night. The NHS notes that newborns wake frequently for feeds. Being uncomfortably warm or cold also disturbs infant sleep.
Safe sleep environments are essential. The NHS and The Lullaby Trust advise:
- Placing your baby on their back for every sleep, day and night
- Room sharing with your baby in their own bassinet or crib for at least the first 6 months
- Keeping the crib clear of pillows, duvets, bumpers, loose blankets, and soft toys
- Maintaining room temperature between 16 and 20 degrees Celsius
For tips on distinguishing day and night, see newborn when does sleep get better.
Baby sleep hours by month
The following comparison pairs NHS ranges with guidance from the American Academy of Sleep Medicine (AASM), endorsed by the American Academy of Pediatrics (AAP). The AASM does not provide official duration guidelines for infants under 4 months.
| Age | NHS clinical guidance | AASM and AAP consensus (24 hours, naps included) |
|---|---|---|
| Newborn (0-3 months) | Total 8 to 18 hours | No official range specified |
| 3 to 6 months | Some babies sleep 5 to 8 hours at night | 12 to 16 hours from 4 months |
| 6 to 12 months | Up to 12 hours possible at night | 12 to 16 hours |
| 12 to 24 months | Total 12 to 15 hours | 11 to 14 hours |
Guidelines provide healthy reference ranges rather than strict limits. Every infant's sleep architecture matures at its own pace.
How much should a 3 month old sleep?
According to the NHS, night feedings often decrease between 3 and 6 months, and some babies begin sleeping 5 to 8 hours continuously at night, though many continue waking. The AASM recommendation begins at 4 months, setting a target of 12 to 16 hours of total sleep.
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How much should a 7 month old sleep?
Under AASM and AAP recommendations, infants aged 4 to 12 months require 12 to 16 hours of total sleep per 24 hours, including naps. The NHS notes that night feedings may no longer be nutritionally necessary between 6 and 12 months, and some babies sleep up to 12 hours at night, though teething and hunger can still cause awakenings.
Baby development
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When to seek medical advice
The NHS recommends consulting a healthcare professional if persistent sleep struggles cause distress. Seek immediate emergency medical care if:
- Your baby is difficult to wake, cannot be woken, or is unusually floppy and unresponsive
- Breathing is abnormally rapid, strained, or accompanied by grunting
- Skin, lips, or tongue appear blue, grey, pale, or mottled
- The baby has a weak, high pitched, or continuous inconsolable cry
- An infant under 3 months has a fever of 38 degrees Celsius or higher
- The baby has not produced a wet diaper in 12 hours
If feeding cessation or signs of serious illness appear, seek prompt evaluation. In the US call 911; in the UK call 999; in Europe call 112.
Frequently asked questions
What if my baby sleeps outside these ranges?
The NHS emphasizes that each child develops unique sleep patterns. If your baby is alert during wake windows, feeds well, and gains weight steadily, variation is normal. Consult your pediatrician with specific concerns. See baby milestones by month.
How much do toddlers sleep after 1 year?
The NHS reports 12 to 15 hours of total sleep between 12 and 24 months. The AASM recommends 11 to 14 hours for children aged 1 to 2 years.
Sources
- NHS Best Start in Life: Your baby's sleep patterns
- NHS: Helping your baby to sleep
- NHS: Reduce the risk of sudden infant death syndrome (SIDS)
- NHS: Is your baby or toddler seriously ill?
- The Lullaby Trust: Safer sleep information
- AASM: Recharge with sleep, pediatric sleep recommendations
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