Baby Sleep Schedule Calculator
Enter your baby's age to get age-appropriate wake windows, total daily sleep needs, recommended nap count, a sample schedule, and alerts for common sleep regressions.
How old is your baby?
Reference Guide
Common baby sleep regressions
Sleep regressions are temporary periods of disrupted sleep caused by developmental leaps, physical milestones, or biological changes. Knowing when to expect them takes the panic out of the backslide.
| Age | Trigger | Typical duration | Intensity |
|---|---|---|---|
| 4 months | Sleep architecture matures permanently | 2–6 weeks | High |
| 8–10 months | Major motor leaps + object permanence | 1–4 weeks | Medium |
| 12 months | 2-to-1 nap transition + walking | 2–8 weeks | Medium |
| 18 months | Language explosion + molars + autonomy | 2–6 weeks | High |
| 2 years | Developmental leap + nap drop begins | 2–4 weeks | Medium |
Safe Sleep
AAP safe sleep guidelines
Following safe sleep guidelines reduces SIDS risk significantly. These apply to every sleep — naps and nights, at home and away.
Back to sleep, every sleep
Always place baby on their back for every nap and nighttime sleep — even if they can roll over. This is the single most important SIDS prevention measure.
Firm, flat sleep surface
Baby should sleep on a firm, flat mattress with a fitted sheet only. No pillows, blankets, bumpers, wedges, or positioners in the sleep space.
Room-sharing, not bed-sharing
The AAP recommends room-sharing (baby in their own safe sleep space in your room) for at least 6 months, ideally 12. This reduces SIDS risk by up to 50% without the hazards of bed-sharing.
Temperature matters
Keep the room between 68–72°F (20–22°C). Overheating is a SIDS risk factor. Use a sleep sack instead of loose blankets to keep baby warm.
No inclined sleepers
Rock 'n Plays and other inclined sleepers are not safe for unsupervised sleep. If baby falls asleep in a car seat or swing, transfer to a flat surface.
Always consult your pediatrician with concerns about your baby's sleep or growth. This tool provides general guidance, not medical advice.
Baby sleep questions
What are wake windows for babies?
A wake window is the amount of time a baby can comfortably stay awake between sleep periods before becoming overtired. Wake windows start at 45–60 minutes for newborns and gradually lengthen as babies develop. Following age-appropriate wake windows is one of the most reliable ways to help babies fall asleep more easily and sleep longer stretches — overtired babies produce cortisol, which actually makes falling asleep harder, not easier.
How much should a newborn sleep?
Newborns (0–3 months) typically sleep 14–17 hours per day, spread across 5–6 sleep periods around the clock. They have no circadian rhythm yet, so day and night are interchangeable. Night stretches gradually lengthen as the circadian system matures, usually showing meaningful improvements between 6–12 weeks.
When do babies sleep through the night?
There is no universal milestone for 'sleeping through the night.' Most parents define it as a 6+ hour stretch. Many babies naturally achieve this somewhere between 3–6 months, though some don't until 9–12 months or later — and all of those are within the normal range. Sleep training (when appropriate for the family) can help babies who are developmentally ready but still waking frequently.
What is the 4-month sleep regression?
The 4-month sleep regression is caused by a permanent change in how babies cycle through sleep stages — their sleep architecture matures to resemble adult sleep, with lighter sleep stages and full arousals between cycles. This is a developmental milestone, not a problem to fix. It typically lasts 2–6 weeks. Consistent bedtime routines and age-appropriate wake windows help most families through it.
When should I start a baby sleep schedule?
A true schedule (with set nap times on the clock) typically isn't realistic until 4–6 months, when nap timing becomes more predictable. Before that, follow wake windows rather than the clock — put baby down a set amount of time after they last woke up, not at a set time of day. By 6 months, most babies can follow a consistent 2-nap schedule with predictable nap windows.
Is the cry-it-out method safe?
Decades of research show that graduated extinction methods (including cry-it-out) do not cause psychological harm when used with developmentally ready babies (typically 4–6+ months). Multiple randomized controlled trials show no negative effects on attachment, stress, or behavior. However, sleep training is a personal decision — there is no 'right' approach, and many families find gentle methods, safe sleep environments, and consistent routines sufficient without formal sleep training.
Related Tools