Free tool · data from paediatric sleep guidelines

Baby Wake Window Calculator

See how long your baby can comfortably stay awake between sleeps, based on age.

Baby age — months

or Date of birth

Last woke up at (optional)

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Wake windows are practitioner heuristics, not clinical rules — every baby varies. Use as a loose guide.

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Track every sleep & feed with Bebblo

Bebblo turns these wake windows into a daily sleep plan, automatically. Free, offline, 14 languages.

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