WakeSharp · Free Tools
Sleep Calculator
Find bedtime or wake-up time from your sleep target. Compare seven, eight and nine hours with an adjustable time to fall asleep.
Your result
How it works
Choose what to calculate, enter a time, and adjust your sleep target. We add time to fall asleep to the time asleep. Sleep cycles vary; this cannot predict your sleep stages or guarantee a refreshed morning.
Questions
Are these tools free and private?
Yes. No account or payment is needed. Calculations run in your browser. Optional analytics never include your inputs or results.
Sources
www.nhlbi.nih.govExplore another tool
Plan bedtime here. Make getting up a mission with WakeSharp.
Download WakeSharp
These website tools are free. The WakeSharp app requires a subscription. See pricing.Available on the App Store and Google Play