Use this online tool to calculate your ideal bedtime and wake-up time based on your sleep cycle and preferences. Learn how sleep cycles work, why they matter, and how they affect your health and well-being. Calculate optimal sleep and wake times based on sleep cycles. Get personalized recommendations for better sleep quality and wake up feeling refreshed. Our sleep calculator will give you insight into your ideal sleep schedule based on the number of sleep cycles you’re likely to attain. It’s also helpful to get a clearer picture of how many sleep cycles you might be getting when you enter your typical sleep patterns. Sleep Calculator helps you determine the perfect bedtime and wake up time for optimal rest. Calculate your sleep cycles and improve your sleep quality with our free sleep time calculator.