Wake window = awake time.
It usually means the time from when your baby wakes until the next sleep. Newborn windows can be very short.
Free sleep tool
Baby wake window calculator.
Use your baby’s age and last wake time to estimate the next nap window. It is not a rigid schedule — it is a calm planning tool for the exhausted shift lead.
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Reality check: wake windows are estimates. Growth spurts, feeds, sickness, premature birth, daycare, travel, and temperament can all change sleep timing. If sleep concerns feel medical or extreme, ask your pediatrician.
Use sleepy cues too.
Rubbing eyes, zoning out, red eyebrows, fussing, or turning away can matter more than the exact minute.
Track the real baby.
DadYolked sleep logs help you see the actual rhythm: naps, longest stretches, and what usually happens after feeds.
| Age | Typical wake window | Notes |
|---|---|---|
| 0–4 weeks | 30–60 minutes | Many newborns barely finish feeding before they are ready again. |
| 4–12 weeks | 60–90 minutes | Still flexible; overtired can happen fast. |
| 3–4 months | 75–120 minutes | Some babies begin showing more predictable rhythms. |
| 5–7 months | 2–3 hours | Nap count often starts consolidating. |
| 7–10 months | 2.5–3.5 hours | Many babies move toward two naps. |
| 11–14 months | 3–4 hours | One-to-two nap transition may start for some babies. |
| 14–24 months | 4–6 hours | Often one nap, but individual needs vary. |
Turn sleep chaos into a pattern.
DadYolked logs naps, sleep locations, feeds, diapers, medicine, milestones, widgets, Apple Watch, Siri shortcuts, and private local-first records for the newborn day.
Sources and review notes
This calculator uses common wake-window ranges reflected by pediatric and sleep-education references. Wake windows are behavioral planning estimates, not medical rules.