Sleep Calculator
Use this free sleep calculator to discover the best time to go to bed based on your natural sleep cycles. Wake up feeling refreshed and clear-headed by timing your sleep the right way.
When do you want to wake up?
▼ Ad
Sleep Cycles
Our sleep cycle is a pattern that repeats itself while we sleep. It has different stages, mainly rapid eye movement (REM) sleep and non-rapid eye movement (NREM) sleep.
During these stages, our body rests, repairs, and grows. REM sleep is when we have vivid dreams and our brain is very active, helping us remember things and deal with emotions. Overall, sleeping is immensely important for your health.
How We Calculate Your Sleep
Knowing your sleep cycle is essential to figure out the best time to go to bed. That’s why we developed this sleep calculator. Most people feel best when they wake up after 5 or 6 complete sleep cycles, and the average sleep cycle is 90 minutes. You should also allow for 15 minutes to fall asleep.
By understanding this cycle, you can choose a bedtime that allows you to wake up feeling refreshed and ready for the day. If you wake up feeling groggy or tired, you might need to adjust your bedtime to align better with your sleep cycle.
REM Sleep
REM sleep, short for Rapid Eye Movement sleep, is the stage of sleep most closely linked to dreaming, memory consolidation, and emotional regulation.
During REM sleep, your brain becomes highly active while your body remains temporarily paralyzed, which prevents you from physically acting out dreams. This stage plays a crucial role in learning, creativity, and mood stability, as the brain processes information and emotions from the day.
REM sleep typically occurs in longer periods later in the night, which is why getting enough total sleep is essential. When REM sleep is consistently cut short, people often experience brain fog, poor concentration, increased emotional sensitivity, and reduced cognitive performance.
NREM Sleep
NREM sleep, or Non-Rapid Eye Movement sleep, makes up the majority of your sleep and is essential for physical recovery and overall restoration. It includes the lighter stages of sleep as well as deep sleep, during which your body repairs tissues, strengthens the immune system, and releases growth hormone.
Brain activity slows during NREM sleep, allowing your nervous system to recover from daily stress and mental effort. This stage also supports memory consolidation, especially for factual and motor skills. When NREM sleep is disrupted, people often feel physically exhausted, sore, and mentally sluggish, even if they spent enough hours in bed.
▼ Ad