Although the calculator can help you wake up during a lighter slumber, that’s not to say you should actively pursue fewer hours of shuteye than recommended by the medical community. Experts suggest that adults get between 7 and 9 [5] hours of slumber each night, which correlates to 5 or 6 full cycles. However, this amount can vary depending on your health and personal circumstances. For instance, if you are recovering from a cold, you will likely doze off longer than you would normally. Babies, children, and teens should get even more slumber. For example, a newborn baby needs between 14 and 17 hours of shuteye.