Find out exactly how much sleep your baby needs by age — from newborn to toddler. Calculate ideal nap schedules, wake windows, and bedtimes for healthy brain development.
Total daily sleep recommendations including naps
Use our sleep calculator to find the ideal bedtime and wake time for your baby based on their age and how many naps they take each day.
Open Sleep Calculator →Understanding how much sleep your baby needs at each developmental stage is one of the most important tools for new parents. Sleep requirements change dramatically in the first two years of life as the brain develops and sleep architecture matures. What's normal for a 2-week-old is very different from what's appropriate for a 10-month-old.
Newborns (0–3 months): 14–17 hours of total sleep per day, in 2–4 hour segments around the clock. Newborns have no established circadian rhythm and cannot distinguish day from night yet. Night stretches gradually lengthen as the nervous system matures.
Infants (4–11 months): 12–15 hours per day, with emerging night consolidation. Most babies begin sleeping 6+ hour stretches at night by 4–6 months. Nap count drops from 3–4 to 2 as the baby grows. Circadian rhythm becomes established around 3–4 months.
Toddlers (1–2 years): 11–14 hours including one nap. Most toddlers transition from 2 naps to 1 nap around 15–18 months. Nap length extends to 1–2 hours as nap frequency decreases.
A wake window is the maximum amount of time a baby can stay awake between sleep periods before becoming overtired. Respecting wake windows is critical — an overtired baby produces excess cortisol (the stress hormone), which makes falling asleep and staying asleep harder, creating a frustrating cycle.
Wake windows increase as babies grow: 0–6 weeks: 45–60 minutes. 6–12 weeks: 60–90 minutes. 3–4 months: 75–120 minutes. 5–6 months: 2–2.5 hours. 7–9 months: 2.5–3 hours. 10–12 months: 3–4 hours. 12–18 months: 3.5–5 hours (depending on nap count).
Timing sleep based on wake windows rather than strictly on the clock produces more consistent results. Watch for sleepy cues — eye rubbing, yawning, reduced activity, staring into space — as signals that the wake window is ending and sleep needs to happen soon.
Baby sleep is not simply rest — it is one of the most critical periods for brain development. During sleep, the brain consolidates memories, processes sensory experiences from the day, builds neural connections, and releases growth hormones. Research shows that infants who get adequate, consistent sleep demonstrate better language development, emotional regulation, and cognitive function than sleep-deprived peers.
REM sleep (rapid eye movement sleep, during which dreaming occurs) is especially abundant in infants — accounting for up to 50% of newborn sleep compared to 20–25% in adults. This high REM proportion is thought to support rapid brain development. Protecting your baby's sleep schedule is one of the most developmentally supportive things a parent can do.
Consistent sleep routines help babies and toddlers anticipate sleep, reducing resistance and making transitions smoother. An effective bedtime routine typically takes 20–30 minutes and includes 3–5 predictable steps that signal sleep is coming: bath, pajamas, feeding, book, and song is a classic sequence. The order matters less than the consistency.
Dim lights 30–60 minutes before bedtime. Bright light, especially blue light from screens, suppresses melatonin production and delays sleep onset. A consistent wake time in the morning is as important as a consistent bedtime — it anchors the circadian rhythm and helps regulate nap timing throughout the day.
White noise can be helpful for masking household sounds and creating a sleep-associated cue. Use white noise at a safe volume (no louder than 50 decibels, roughly the level of a quiet conversation) and place the machine at least 7 feet from the baby's sleep surface.
Sleep regressions are periods when a baby who previously slept well suddenly begins waking more frequently, resisting sleep, or napping poorly. They typically coincide with developmental leaps: the 4-month regression reflects the permanent maturation of sleep architecture. The 8–10 month regression coincides with increased mobility (crawling, pulling to stand) and object permanence development. The 18-month regression aligns with language acquisition and increased separation anxiety.
These regressions are developmentally normal and signal a healthy brain that is growing. The 4-month regression is the most impactful because it is permanent — sleep architecture changes and does not revert. Many parents find that teaching independent sleep skills (falling asleep without being held or fed) becomes especially important at or after this stage.
The American Academy of Pediatrics recommends the "ABCs of Safe Sleep": Alone, on their Back, in a Crib (or bassinet/play yard). Always place babies on their back to sleep — this single practice has reduced SIDS rates by over 50% since the "Back to Sleep" campaign launched in 1994. Keep the sleep surface firm and flat. Avoid bumpers, pillows, loose blankets, positioners, and stuffed animals in the sleep area. Room-sharing (but not bed-sharing) is recommended for at least 6 months and ideally 1 year.
Newborns (0–3 months): 14–17 hours. Infants (4–11 months): 12–15 hours. Toddlers (1–2 years): 11–14 hours. These totals include nighttime sleep and all daytime naps.
A wake window is the time a baby can comfortably stay awake between sleeps. Newborns: 45–60 min. By 6 months: 2–2.5 hours. By 12 months: 3–4 hours. Exceeding wake windows causes overtiredness, making sleep harder.
A permanent developmental shift where babies' sleep cycles mature to resemble adult sleep — cycling between light and deep stages every 45–60 minutes. Babies may wake between cycles if they haven't learned to self-settle. It does not go away on its own; teaching independent sleep skills helps most families.
Always place babies on their BACK on a firm, flat surface (crib/bassinet). Keep the sleep area free of soft objects and loose bedding. Room-share but avoid bed-sharing for at least 6 months. Maintain a comfortable room temperature (68–72°F). Consider a pacifier at sleep time.