Wake Window Calculators — Every Age, Newborn to 3 Years
Thirteen calculators, one method: your baby's age and wake-up time in, the wake-window range and clock-time nap plan out. Each age page locks onto that month's typical windows so the math is already done when you land — because at 3 AM with a wide-awake 8-month-old, you don't want to compute anything.
More Wake Window Calculators
Wake Window Calculator
Pick your baby's age, enter when they woke up, and get the wake-window range plus the clock times for the next nap and bedtime.
Nap Schedule Generator
Enter your baby's age and wake-up time — get a full-day nap schedule with clock times for every nap and bedtime.
Baby Bedtime Calculator
Enter your baby's age and the time the last nap ended — get the bedtime window that fits the age's final wake window.
3-Month-Old Wake Windows
3 months: wake windows 1 h–1 h 30 min, 4–5 naps, 14–16 h total sleep. Calculator preset to this age.
4-Month-Old Wake Windows
4 months: wake windows 1 h 15 min–1 h 45 min, 3–4 naps, 14–15 h total sleep. Calculator preset to this age.
5-Month-Old Wake Windows
5 months: wake windows 1 h 30 min–2 h 15 min, 3 naps, 13.5–14.5 h total sleep. Calculator preset to this age.
6-Month-Old Wake Windows
6 months: wake windows 2 h 15 min–2 h 45 min, 2–3 naps, 13.5–14.5 h total sleep. Calculator preset to this age.
7-Month-Old Wake Windows
7–8 months: wake windows 2 h 30 min–3 h 15 min, 2–3 naps, 13.5–14.5 h total sleep. Calculator preset to this age.
8-Month-Old Wake Windows
7–8 months: wake windows 2 h 30 min–3 h 15 min, 2–3 naps, 13.5–14.5 h total sleep. Calculator preset to this age.
9-Month-Old Wake Windows
9–10 months: wake windows 3 h–3 h 30 min, 2 naps, 13.5–14 h total sleep. Calculator preset to this age.
10-Month-Old Wake Windows
9–10 months: wake windows 3 h–3 h 30 min, 2 naps, 13.5–14 h total sleep. Calculator preset to this age.
12-Month-Old Wake Windows
11–12 months: wake windows 3 h 15 min–4 h, 2 (1–2) naps, 13.5–14 h total sleep. Calculator preset to this age.
18-Month-Old Wake Windows
16–18 months: wake windows 4 h–5 h, 1 naps, 12.5–13.5 h total sleep. Calculator preset to this age.