Sleep Calculator
Calculate optimal sleep and wake times
I need to wake up at:
π‘ About Sleep Cycles
Each sleep cycle lasts about 90 minutes. Waking up between cycles helps you feel more refreshed. Adults typically need 5-6 complete cycles (7.5-9 hours) per night.
About Sleep Calculator
Find the best time to wake up based on sleep cycles. Our free sleep calculator suggests wake times so you feel rested. Sleep cycles are about 90 minutes. No signup. Toolinho offers free productivity and health tools.
Enter when you want to wake or go to bed above. Try our other free tools: Pomodoro timer, stopwatch, and age calculator.