Smart Sleep Cycle Calculator
Sources: Cajochen et al., Sleep Health (2024), van den Berg et al., Sleep Medicine Reviews (2023). Sleep cycle data from 10,502 hours of lab-recorded sleep.
Disclaimer: This calculator is for educational purposes only and is not a substitute for professional medical advice.
Disclaimer: This calculator is for educational purposes only and is not a substitute for professional medical advice.
Sleep Calculator with science-backed insight— Find Your Best Bedtime or Wake-up Time
Enter when you want to wake up — we’ll suggest the best time to go to bed.
Or if you’re going to bed now, we’ll suggest the best times to wake up.