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Frequently Asked Questions
How accurate is the sleep calculator?
Our calculator uses the standard 90-minute sleep cycle, which is the average for most adults. Individual cycles may vary between 80–110 minutes.
Is the calculator free to use?
Yes, all tools on findsleeptime.com are completely free with no account required.
Do you store my data?
No. All calculations happen locally in your browser. We do not collect or store any personal information. See our Privacy Policy for details.
Can I suggest a new feature?
Absolutely! Use the contact form and select "Feature Request". We read every message.
About This Site
Sleep Cycle Calculator (findsleeptime.com) is dedicated to helping people understand and optimize their sleep. Our tools are built on established sleep science to help you wake up refreshed every day.