At three months a baby is still mostly cue-led. The circadian clock — the internal day/night rhythm — is only starting to mature, so a schedule at this age is a shape to aim at, not a timetable to enforce. Most three-month-olds still take four naps, and the last one is often a short bridge nap that only exists to get everyone to bedtime.
Wake at 7:00 AM, 4 naps of about 1 h each, bedtime at 7:00 PM. Nap times are windows, not deadlines — anywhere inside one counts.
| Part of the day | Clock time | Notes |
|---|---|---|
| Wake | 7:00 AM | |
| Nap 1 | 8:30–9:30 AM | 1 h 30 min awake first |
| Nap 2 | 11:00 AM–12:00 PM | 1 h 30 min awake first |
| Nap 3 | 1:30–2:30 PM | 1 h 30 min awake first |
| Nap 4 | 4:15–5:15 PM | 1 h 45 min awake first |
| Bedtime | 7:00 PM | 1 h 45 min awake first |
The planner adjusts it to your baby's own wake time, bedtime, and birthday — including corrected age if your baby was born early.
The sample day above lands at 4 h of daytime sleep and 12 h overnight — 16 h in 24. A baby at the bottom of the range who wakes up happy is not short on sleep; the range is wide because babies are.
Between three and five months the wake windows stretch and the fourth nap starts to fall apart. Expect the day to reorganise itself around three naps rather than four.
Usually four, sometimes five. The Tier-1 range for this age is 3–5 naps a day. The last nap is often short and late; it is doing its job if it gets you to bedtime without an overtired baby.
Roughly 75–150 minutes, starting shorter in the morning and lengthening through the day. "Wake window" is a practice-based heuristic, not a term from the sleep-medicine literature — treat it as a starting estimate and let sleepy cues override it.
Capping a very long nap can protect the following night, but at three months the total matters more than the distribution. If naps are long and nights are fine, leave it alone.
Tier 1 — evidence-based The ranges on this page are the consensus sleep totals and nap counts below. The phrase "wake window" itself is a Tier 2 practice-based heuristic: it does not appear in the pediatric sleep-medicine literature, so treat the window lengths as a starting estimate and let your baby's sleepy cues override them.