Sleep Cycle Calculator

Calculate the ideal times to wake up or go to sleep based on your sleep cycles. Each sleep cycle lasts about 90 minutes, and you typically need 4-6 cycles per night.

About Sleep Cycles

A typical sleep cycle lasts about 90 minutes, during which your body moves through different stages of sleep:

  • Light Sleep: The transition period between wakefulness and deeper sleep
  • Deep Sleep: The most restorative stage where physical recovery occurs
  • REM Sleep: The stage where dreams occur and mental recovery takes place

For optimal rest, aim to complete 5-6 sleep cycles (7.5-9 hours). Waking up at the end of a cycle helps you feel more refreshed.