Wake-Up Time Calculator
Tell us when you plan to fall asleep and we'll show you the ideal alarm times - each landing at the natural end of a 90-minute sleep cycle. It's a simple wake-up time calculator to help you set a better alarm and reduce morning grogginess.
Best Bedtimes by Wake-Up Goal
Common wake times and the ideal bedtimes to hit 5 or 6 complete sleep cycles:
Tips for Waking Up Easier
- ✓Keep your alarm consistent - even on weekends. Your circadian clock anchors to your wake time.
- ✓Expose yourself to bright light (ideally sunlight) within 30 minutes of waking to reset your body clock.
- ✓Avoid snoozing. Hitting snooze fragments the light sleep you need for an easy wake-up.
- ✓A consistent bedtime matters as much as your alarm. Use this calculator every night.
- ✓Cooler rooms (65–68°F / 18–20°C) deepen slow-wave sleep and make cycle completion more reliable.
Wake-Up Guides
These guides help you choose a wake time and recover faster after the alarm.
Best Time To Wake Up
Choose a wake-time anchor that improves alertness and weekly consistency.
Sleep Cycle Timer
Answer the immediate “if I sleep now, when will I wake up?” question faster.
Sleep Inertia Explained
Understand why some alarms feel brutal and how cycle timing lowers grogginess.
How Much Sleep Will I Get?
Estimate whether your planned sleep window is actually enough before you set the alarm.