Last wake window is often longest
Many babies can stay awake longest before bedtime. Our Wake Window Calculator shows typical ranges by age.
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What time should bedtime be?
Estimate a bedtime based on wake-up time, naps, and the wake window you choose.
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Choosing a bedtime
Start the routine earlier
A calm routine — bath, feed, story — often takes 20–30 minutes, so many parents start it before the bedtime shown.
Adjust by a few minutes
If bedtime feels like a struggle, small shifts of 10–15 minutes are an easy thing to try.
FAQ
Questions parents ask
Is there a perfect bedtime?
No. It depends on your baby, your family’s day and when your baby wakes up.
What if there was no afternoon nap?
Enter the time your baby woke up instead, and choose a shorter wake window.
Is anything stored?
No. It’s a pure time calculation in your browser.