Sleep calculator is a sleep cycle calculator used to calculate your best sleep time based on the time you wake up or wake up time if you go to sleep now.
Most people sleep for an average of 6 to 9 hours each night or 4 to 6 sleep cycles. One sleep cycle is 90 minutes. It takes about 15 minutes for a person to for asleep.
Updated on
03 Sept 2025
Health & Fitness
Data safety
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Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Device or other IDs
No data collected
Learn more about how developers declare collection