昼寝スケジュール計算（0〜36か月）
赤ちゃんの月齢と朝起きる時刻を入れると、起きている時間（活動時間）、昼寝の回数、日中の睡眠、就寝の時間帯と、24時間の時計に描いた1日の例がわかります。
What is a wake window?
A wake window is the amount of time a baby can comfortably stay awake between naps or bedtime. It changes with age as sleep needs decrease.
How accurate are nap schedules?
Schedules are **guidelines, not strict rules**. Every baby is different, so use the calculator as a starting point and adjust based on sleep cues.
What if my baby takes short naps?
Short naps are common, especially under 6 months. Try adjusting the wake window slightly shorter or offering an extra nap to balance total sleep.
When do babies drop to one nap?
Many toddlers still take two naps after their first birthday, but most drop to one nap a day by about **18 months** (KidsHealth). Watch for a refused second nap or a bedtime that keeps drifting later.
How do I handle skipped naps?
If a nap is skipped, move bedtime earlier. Overtired babies often struggle more with sleep.
Is it okay if my toddler stops napping completely?
Yes, eventually. Many children give up their afternoon nap sometime between 3 and 5 years. When naps stop, an earlier bedtime helps them still get enough sleep — 10–13 hours in 24 hours at 3–5 years (AASM).
How many naps does a baby need by age?
In this calculator: 4–6 naps at 0–2 months, 3–4 at 3–4 months, 3 at 5–6 months, 2–3 at 7–9 months, 2 at 10–14 months, 1–2 at 15–23 months, and 0–1 at 2–3 years. KidsHealth notes most babies have 2–3 naps from around 4 months.