Wake-Up Time Calculator

Estimate the best wake-up time based on when you go to bed, how long you take to fall asleep, and full 90-minute sleep cycles.

Enter the time you plan to get into bed.
This helps estimate when sleep actually begins.
Choose the kind of wake-up target you want.
Age slightly affects the sleep-cycle recommendation.
Poor recent sleep may make a later wake-up more useful.
Choose a simpler or more detailed result.
How we calculate

We estimate when sleep actually begins by adding your selected time to fall asleep, then add 90-minute sleep cycles to suggest a practical wake-up time.