How is the 24/7 Sleep Score calculated?

The 24/7 Sleep Score is generated using data from a series of input variables including total time spent sleeping, time required to fall asleep, sleep efficiency, the ratio of deep sleep to light sleep, and the number of sleep cycles and wake events experienced throughout the night. The Sleep Score also takes into account your profile information such as age, sex, weight and height and compares it to the appropriate demographic standard for sleep compiled from millions of nights of sleep. 24/7 leverages advanced machine learning to provide an even more accurate and relevant personalized Sleep Score.