Tired of waking up groggy? This calculator helps you find the perfect bedtime by aligning with your body's natural sleep cycles, so you can wake up feeling refreshed and energized.
The secret to waking up feeling great isn't just about how many hours you sleep—it's about when you wake up. Waking up in the middle of a deep sleep cycle is what causes that tired, groggy feeling known as sleep inertia. This calculator helps you avoid that by identifying bedtimes that allow you to wake up at the end of a natural **90-minute sleep cycle**.
Throughout the night, your brain cycles through different stages of sleep, from light sleep to deep sleep and REM. One complete cycle takes approximately 90 minutes. By timing your sleep to complete a full 5 or 6 cycles, you're more likely to wake up during a lighter stage of sleep, which feels much more natural and leaves you feeling alert and ready for the day.
Disclaimer: This is a tool based on sleep cycle averages. Individual sleep patterns may vary. For sleep-related health issues, please consult a medical professional.
