How much sleep does a baby actually need?
Type this question into a search bar and you'll get a chart. Usually a confident one, with a tidy number for every month. Here's what the expert bodies actually publish — and the one thing they agree on that the charts leave out.
The ranges, from the people who set them
Newborn to 3 months. The World Health Organization recommends 14–17 hours in every 24, naps included. The AAP describes newborns sleeping about 16 to 17 hours a day — but only 1 or 2 hours at a time. The NHS puts it more loosely still: total sleep varies, but "can be around 18 hours."
Three respected sources, three slightly different figures. That isn't sloppiness. It's honesty about a stage where babies genuinely differ.
4 to 12 months. The American Academy of Sleep Medicine recommends 12–16 hours per 24, including naps. The WHO says the same: 12–16 hours for 4 to 11 months. Two independent bodies, one band — this is the strongest agreement anywhere in infant sleep guidance.
1 to 2 years. The AASM: 11–14 hours per 24, including naps. The WHO: 11–14, with regular sleep and wake times.
The number the experts refuse to give
Look closely at the AASM statement and you'll find a footnote that most charts quietly ignore. The Academy publishes no recommendation at all for babies under 4 months — "due to the wide range of normal variation in duration and patterns of sleep."
Sit with that for a moment. The body whose job is to recommend sleep amounts looked at newborns and declined to set a target, on purpose, because the normal range is too wide to make one meaningful. That's why the newborn figures above are descriptions — where babies tend to land — while the figures from four months on are recommendations. The difference is worth feeling. If your six-week-old sleeps fifteen hours and your friend's sleeps eighteen, nobody is doing anything wrong.
Two guardrails that have to travel with the numbers
The AASM attaches two cautions to its ranges, and they matter more than the ranges themselves.
- More is not automatically better. Regularly sleeping more than the recommended hours may also be associated with adverse outcomes, not just sleeping less. The band has two edges.
- Variation is normal, and it's individual. In the AASM's words, individual variability in sleep need is influenced by genetic, behavioral, medical, and environmental factors. The band is where children land — never a score they're graded against.
That second point is the whole reason we built TinyBond the way we did. Every insight in the app compares your baby to your baby's own history — last week, last month — and never to other babies. The chart tells you the room. Your own data tells you where in the room your child lives.
What the ranges are for
Not for checking against, night by night. A single short night means nothing; the ranges are about what's usual over time. If you keep a sleep log, look at the week, not the day. And if you're genuinely worried that your child is sleeping too little or too much, the AASM's own advice is the right one: talk to your child's doctor. That's a conversation for a person who can examine your baby — not for a chart, and not for us.