Short version
A baby sleep schedule by age is a range, not a promise. The useful parts are age in weeks, wake window length, nap count, and the bedtime anchor.
Quick table: sleep schedule by age
| Age | Wake window | Naps | What usually changes |
|---|---|---|---|
| 0-2 months | 20-80 min | 4-8 | Sleep is cycle-based and highly variable. |
| 3 months | 75-105 min | 4-5 | The day starts to become more predictable, but flexibility still matters. |
| 4-5 months | 90-165 min | 3-4 | The 4-to-3 nap transition and the 4-month regression often overlap. |
| 6-8 months | 130-225 min | 2-3 | Many babies move toward a more stable 2- or 3-nap rhythm. |
| 9-12 months | 165-270 min | 2 | Two naps are usually the main structure of the day. |
| 13-18 months | 195-360 min | 1-2 | The transition toward one nap becomes the main schedule question. |
How to use the table
Age sets the range
Older babies can usually stay awake longer and fit fewer naps into the day.
Morning wake-up starts the chain
The first wake-up shapes the first nap, and the first nap shapes the rest of the day.
Bedtime protects the day
When there is not enough space for another nap, an earlier bedtime is often better than a very long final wake window.
The app handles the moving parts
NapCoach recalculates after real events instead of asking you to manually rebuild the plan.
Common mistakes
- Copying another baby's schedule without matching morning wake-up.
- Using age in months only when the baby is changing week by week.
- Forcing one more nap even when bedtime is already getting too late.
- Judging the whole routine by one unusually rough day.