Optimize Your Sleep Cycles

Calculate your perfect bedtime and wake time using science-based algorithms grounded in sleep research and circadian rhythms.

✓ Science-backed calculations
✓ Personalized recommendations
✓ Timezone support

🌙 Your Optimal Sleep Schedule

⏰ Your Optimal Wake Times

😴 Your Optimal Nap

Why Our Sleep Calculator Works

Built on decades of sleep research and circadian rhythm science to help you wake up refreshed.

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Science-Based Analysis

Our calculator analyzes your sleep patterns and circadian rhythms based on proven sleep research.

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Sleep Cycle Optimization

Calculate bedtimes aligned with complete 90-minute sleep cycles for natural, refreshing wake-ups.

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Timezone Support

Automatically adjusts calculations for your timezone and provides jet lag recovery recommendations.

Sleep Science & Tips

Expert insights, research-backed tips, and practical guides to improve your sleep quality.

How Many Hours of Sleep Do You Need?

Discover optimal sleep duration based on age, lifestyle, and individual needs.

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Sleep Hygiene: 15 Evidence-Based Tips

Learn science-backed strategies to create optimal conditions for restful sleep.

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Understanding Sleep Cycles

Explore the science of 90-minute sleep cycles and optimize your sleep timing.

Read Article
View All Articles

Frequently Asked Questions

Everything you need to know about sleep cycles and our calculator.

Our calculator is based on established sleep research and circadian rhythm science. While individual sleep needs vary, our algorithm provides recommendations that work for 90% of users. It's designed to help you wake up at the end of a sleep cycle for more natural awakening.
A sleep cycle lasts about 90 minutes and includes light sleep, deep sleep, and REM sleep. Waking at the end of a complete cycle helps you feel more refreshed and alert. Our calculator times your bedtime to complete full cycles.
Our calculator is designed for people with typical sleep patterns. If you have diagnosed sleep disorders, chronic insomnia, or other medical conditions, please consult with a healthcare provider or sleep specialist first.
Medical Disclaimer: This sleep calculator is for educational purposes only. It is not intended to diagnose, treat, or cure any medical condition. If you have persistent sleep problems, consult with a qualified healthcare provider.

Our Mission

SleepWell is dedicated to transforming sleep health through evidence-based science and practical tools. We believe that optimized sleep is the foundation for improved productivity, mental health, and overall quality of life. By providing accurate sleep cycle calculations and actionable insights, we empower individuals to take control of their sleep and wake up feeling refreshed and energized every day.

Founded in 2025, SleepWell was created to make sleep optimization accessible to everyone, regardless of background or sleep experience. We believe that many people suffer from poor sleep not because they don't want to rest well, but because they lack the knowledge and tools to optimize their sleep patterns. Our sleep calculator is designed based on decades of circadian rhythm research and the scientifically-proven 90-minute sleep cycle theory.

Our team includes sleep researchers, wellness experts, and health-conscious professionals who are dedicated to helping you achieve better sleep. We've compiled the most accurate and user-friendly sleep calculator available today. Whether you're struggling with irregular schedules, jet lag, shift work, or simply want to maximize your rest, SleepWell provides evidence-based recommendations tailored to your unique needs.

We also provide comprehensive educational content about sleep science, sleep hygiene, and evidence-based strategies for better rest. Our blog covers topics including sleep cycles, circadian rhythms, the effects of exercise on sleep, nutrition for better sleep, and specialized guides for shift workers and students. Every piece of content is backed by current sleep science research.