A sleep calculator is a tool that helps you figure out what time to go to bed to get the optimal amount of sleep every night. Our sleep calculator takes several criteria into account – what time to go to bed, when you want to wake up, your age, and how long it takes for you to fall asleep, on average. It can also be used to figure out what is the best time to wake up to complete a full sleep cycle with the deep sleep phase. Using this sleep cycle calculator, you may be able to adjust your routine and improve your overall sleep quality over time.