What time should my baby go to bed?

It depends on age and the last nap, not a fixed clock. This tool suggests a window based on the wake window after the final nap. Many babies do well with an earlier bedtime than parents expect.

Why is my baby's bedtime different each day?

Because it hangs off the last nap, which moves. If naps run late, bedtime shifts later; if a nap is missed, an earlier bedtime often helps avoid overtiredness.

How does this help with twins?

Running both babies on the same wind-down window keeps their bedtimes together, which protects your evening. Track both last-wake times to keep them aligned.

Baby bedtime calculator: when should baby go to bed?

Baby bedtime calculator

Baby age

Woke from last nap at

Worked out in your browser. Nothing you enter is sent anywhere.

Bedtime follows the last nap

A baby's bedtime is not really a clock time; it is a wake window after the last nap of the day. This tool adds a typical wind-down window for the age to your last-wake time, so bedtime moves sensibly with the day.

Watch for the tired cues

The window is a guide. If your baby is yawning, going quiet or rubbing their eyes before it, settle them. An overtired baby is harder to put down, so it is usually better to err early.

Quick answer

This bedtime calculator adds an age-appropriate wake window to the last time your baby woke, to suggest a bedtime range. Enter the last wake of the day and pick an age band. It runs in your browser. Bedtime works best when you pair the suggested window with your baby's tired cues rather than a fixed clock time.

How to use it

Enter the last wake. Set the time your baby last woke from a nap. The calculator fills in the current time to start with.
Pick the age band. Choose the range that matches your baby's age; each uses a typical wind-down window.
Read the bedtime window. You get a range to aim for. Start the wind-down toward the earlier end if you see tired cues.

Frequently asked questions

What time should my baby go to bed?: It depends on age and the last nap, not a fixed clock. This tool suggests a window based on the wake window after the final nap. Many babies do well with an earlier bedtime than parents expect.
Why is my baby's bedtime different each day?: Because it hangs off the last nap, which moves. If naps run late, bedtime shifts later; if a nap is missed, an earlier bedtime often helps avoid overtiredness.
How does this help with twins?: Running both babies on the same wind-down window keeps their bedtimes together, which protects your evening. Track both last-wake times to keep them aligned.