Sleep month by month

Baby sleep at 12 months
one nap or two?

📖 3 min read 🔬 WHO Updated: October 2026

At one year, a child still sleeps 11 to 14 hours a day according to the WHO. Most keep two naps for several more months, even when one of them starts being refused.

The ranges at 12 months

RangeAt 12 months
Total sleep over 24 h11 to 14 hours
Naps per dayUsually 2
Wake window2 h 45 min to 5 hours
💡 How to read these ranges: total sleep comes from the World Health Organization guidelines (2019). Naps and wake windows are starting points, not measurements: two babies of the same age can both be far from them and be perfectly fine. What matters is your baby's mood, appetite and the regularity of their rhythm.

One nap or two?

The switch to a single nap most often happens between 15 and 24 months. A few refused naps at 12 months are not enough to decide: teething, illness or a new skill often upset the rhythm for a few days. It is repetition over one to two weeks, outside illness and changes of setting, that signals a real transition. The signs and the gradual method.

The bedtime routine, more useful than ever

At one year, children anticipate: a sequence of steps that never changes (bath, pyjamas, story, cuddle) tells them night is coming. Four steps every evening are better than ten every other evening. What the studies show.

Sleep setup

The HAS guidelines are written for infants: on their back, in a cot with bars, in a sleeping bag, with no pillow, duvet or objects in the cot, in a room at 18 to 20 °C. Ask your paediatrician when and how to adapt them.

When to talk to a doctor

See a doctor if your baby consistently sleeps much less than these ranges, is hard to wake or drowsy all the time, or if their sleep comes with loud snoring, pauses in breathing or a drop in their growth curve.

The next nap, estimated for your baby

Bercea starts from these ranges, then learns your child's rhythm from every sleep you log: when naps start, how long they last, when bedtime comes. Free, no ads, no account.

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