Sources & method

NaptimeNow turns typical, published ranges into a practical day. It's general information for healthy, full-term babies, not medical advice.

Where the numbers come from

• Total sleep per 24 hours: Paruthi S. et al., "Recommended Amount of Sleep for Pediatric Populations", a consensus statement of the American Academy of Sleep Medicine (2016), endorsed by the American Academy of Pediatrics: 12–16 h for 4–12 months, 11–14 h for 1–2 years, 10–13 h for 3–5 years (including naps).
• Newborn sleep (0–3 months): National Sleep Foundation guidance (14–17 h) and NHS descriptions of newborn sleep.
• Safe sleep: Moon R. Y. et al., "Sleep-Related Infant Deaths: Updated 2022 Recommendations", AAP Task Force on SIDS, Pediatrics (2022); NHS and The Lullaby Trust.
• Sleep regulation: Borbély A. A., "A two process model of sleep regulation" (1982), and the general literature on infant sleep-cycle development.
• Wake windows and nap counts: these are practical ranges widely used by pediatric sleep educators and parenting resources. They are not a formal medical standard, and we present them as ranges.

How the generator works

For each age we store a wake-window range, a nap count (or two at transition ages) and typical nap lengths. Starting from your wake-up time, the tool adds the first wake window, places nap 1, then repeats. Wake windows get evenly longer from the first to the last of the day. Plan from a target bedtime and it runs the same maths backwards. Everything is calculated in your browser.

The routine helper

The Ask page uses an AI model (via Vercel AI Gateway) instructed to stay within these ranges and mainstream guidance, to avoid diagnoses, and to point you to your pediatrician for anything medical. AI can be wrong: double-check anything important.