Estimate the next sleep window
Enter an age and the latest wake time to see an age-based earliest and latest next-sleep estimate.
Calculate a sleep windowExample: 4 months old, awake at
08:30to09:30
From a 90–150 minute age guide
Free tools for tired parents
Estimate a practical sleep window or play quiet background noise directly in your browser. Each tool is free, works without an account, and explains its limits.
Play a steady background sound
Read the volume, distance and switch-off guidance from AAP and Pediatrics research.
Open white noiseTry a deeper background sound
Compare it with white noise, and read the same safety guidance.
Open pink noise