Are you sick and tired of feeling sluggish and unrefreshed even after a full night’s sleep? Believe it or not, this could all be down to the time you choose to go to bed and get up every day. So, how do you calculate the optimum amount of sleep for your personal health and needs? […]

Sleep Calculator, Guidelines for better sleep, with sleep calculator you can decide when you should go to bed to wake up refreshed, see what to do before...

Our personalized sleep calculator will help you find out your best time to wake up or go to bed based on your unique sleep cycle.

Formerly the Sleepytime Sleep Cycle Calculator, this tool will tell you exactly what time to fall asleep and wake up for optimal performance

Check out this guide to estimate what time you should go to bed depending on what sleep cycles your on.

Good news for night owls, a new sleep calculator suggests that going to bed early may not actually be the key to waking refreshed - you simply need to...

Ultradian rhythms last fewer than 24 hours and can be found in the pattern of human sleep. This cycle alternates between REM (rapid eye movement) and NREM (non-rapid movement) sleep and consists of five stages. The cycle starts at light sleep, progressing to deep sleep and then REM sleep, where brain waves speed up and dreaming occurs. This repeats itself about every 90 minutes throughout the night.

The amount of sleep each person needs varies, but there are some general guidelines you should know about. Find out how to optimize your sleep routine.

Use our sleep calculator to find your best bedtime based on age and your desired wake-up time.