Sleep Cycle Bedtime Calculator

Plan your bedtime, calculate wake-up options, and explore your sleep history with Sleep Calc for iPhone and Apple Watch. No account or sign-up required.

Find a time that fits
Enter your wake-up time to see bedtime options, or enter your bedtime to see wake-up options. Adjust the time you need to fall asleep and the range of sleep cycles shown.

Calculate on Apple Watch
Check bedtime and wake-up options from your wrist. Your calculator settings sync between your iPhone and paired Apple Watch.

Review your sleep history
Connect Apple Health to view sleep records from your Apple Watch or other compatible apps. Explore your sleep duration, bedtime consistency, interruptions and Sleep Scores with summaries and charts. The most recent 14 days are available for free. Full available sleep history requires Sleep Calc Pro.

Set bedtime and wake-up alarms
Create alarms from your calculated times, edit their times and labels, choose repeat days and select an alarm sound. Requires Sleep Calc Pro and an iPhone or iPad running iOS 26 or iPadOS 26 or later.

Purchases and subscriptions
Additional paid features are available through one-time purchases and auto-renewable subscriptions. Available options, included features, and prices are shown in the app before purchase. Subscriptions renew automatically unless canceled. You can manage or cancel them in your App Store account settings.

About the estimates
The calculator uses fixed 90-minute cycle estimates; actual sleep cycles vary. It does not measure or predict your sleep stages. Sleep Scores summarize the sleep data available in Apple Health and are not a medical assessment.

Privacy Policy: https://sleepcycles.carrd.co/#privacy
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/