A wake window is the time from waking up to falling asleep again. Keeping an eye on the time can help you understand your day. It cannot tell you exactly when your baby must sleep next. Watch your baby’s behaviour too.
Sources: Paruthi et al. (2016) · BIÖG
A wake window sits between two sleeps
Observe → offer a calm moment → notice the response
What is being measured?
For your notes, count from waking up to falling asleep again. Time spent helping your baby settle counts too. Some charts stop at the start of the bedtime routine, so their numbers may differ.
Consistency matters more than perfect precision. Mark uncertainty, such as not knowing exactly when your baby fell asleep in the stroller.
Why we do not prescribe minutes
A recommendation for daily sleep does not tell you when your baby should sleep. Other babies’ wake times cannot set the time of your baby’s next nap either.
Our sources do not set fixed wake times for every age. Wake times can still be useful. Treat them as clues rather than rules. Our illustration shows only the order of sleep and awake time.
Sources: Paruthi et al. (2016) · BIÖG
Consider timing and behaviour together
Alongside the time, note what you observe: becoming quieter, turning away, yawning or seeming unsettled. These observations help you get to know your baby, but none exclusively identifies a need for sleep.
Instead of “sleep must happen now”, ask “might a calmer setting help?”. If it does not, neither your notes nor your judgement have failed.
Sources: BABYFREUNDLICH
Digital predictions are estimates too
A time calculated from past entries depends on what was recorded. A missed nap changes the apparent wake window. New circumstances cannot reliably be predicted from old data.
Use an estimate as a reminder to observe. It should not override tiredness, hunger or individual medical advice.
When to seek support
Seek support for persistently difficult settling, pain, feeding problems or unusual sleepiness. A more precise timer does not replace assessment of symptoms.
Common questions
Does settling time count?
In our definition, yes: the interval ends at observed sleep onset. Other charts may count differently.
Can Livona predict the next sleep with certainty?
No. The Premium sleep clock estimates timing from recorded wake periods. Missing entries and changing circumstances limit it.
Sources & further information
The sources for this guide are linked below. Examples and everyday tips help explain the topic; they are not a personal plan for your baby. Sources last accessed on 20 September 2026.
- Paruthi et al. (2016): AASM-Konsens zur Schlafdauer
Professional guidance; see the linked publication for context.
- BIÖG: Das Wichtigste zum Schlaf im ersten Lebensjahr
German-language health resource; local guidance may differ.
- BABYFREUNDLICH: Unruhige Nächte (2025)
German-language health resource; local guidance may differ.
- DGSM: Schlafstörungen bei Säuglingen, Kleinkindern, Kindern und Jugendlichen
German-language health resource; local guidance may differ.
- NHS: Dehydration
UK public-health guidance.
This guide was created with AI assistance and has not been medically reviewed. How we create our guides.
