By age · Infant (4–11 mo)
How much sleep do infants (4–11 months) need?
Around month 4, infants begin to consolidate night sleep. Most settle into a 1–2 nap daytime pattern.
Recommended
12–15 hrs
Cycles per night
8–10
Source
National Sleep Foundation 2015
What this means in practice
The 12–15 hour range is the consensus from large meta-analyses, not a strict cutoff. Individuals at the edges of the band are usually fine. Chronic sleep below the lower bound is where measurable harm appears in cognitive, metabolic, and immune endpoints.
Use our sleep calculator to translate the recommended hours into a bedtime that ends a full 90-minute cycle.