R90 sleep calculator

Our personalized sleep calculator will help you find out your best time to wake up or go to bed b...

If you need to wake up by 7am then count back 7.5 hours to find that bedtime is around 11.30pm. M...

We look at how many hours of sleep are recommended and how to use a sleep cycle calculator (such ...

Want to wake up in a good shape? Find out the perfect bedtime or wake up time to rise feeling ref...

It takes, on average, about 90 minutes to go through each cycle. Completing five cycles a night m...