Sleep Calculator
Calculate optimal sleep times, track your sleep quality, and get personalized recommendations for better rest based on sleep cycles.
Find Your Ideal Bedtime
Enter your desired wake-up time, and we'll calculate the best times to go to bed based on sleep cycles.
Recommended Bedtimes
For optimal rest, try to fall asleep at one of these times:
About Sleep Cycles
These times are based on the average 90-minute sleep cycle. Waking up at the end of a cycle helps you feel more refreshed. Aim for 7.5-9 hours of sleep for optimal rest.
Tips for Better Sleep
Consistent Schedule
Go to bed and wake up at the same time every day, even on weekends.
Dark Environment
Keep your bedroom dark, quiet, and cool for optimal sleep conditions.
Limit Screen Time
Avoid screens (phones, tablets, computers) at least 1 hour before bedtime.
Watch Caffeine Intake
Avoid caffeine at least 6 hours before bedtime to prevent sleep disruption.
Sleep Facts
- ⏰ Most adults need 7-9 hours of sleep per night
- ⏰ A complete sleep cycle takes about 90 minutes
- ⏰ REM sleep makes up about 25% of your total sleep time
- ⏰ Humans spend about 1/3 of their lives sleeping
- ⏰ Poor sleep is linked to higher body weight
- ⏰ Good sleep can improve concentration and productivity
Did You Know?
The world record for the longest time without sleep is 11 days and 25 minutes, set by Randy Gardner in 1964. However, this is extremely dangerous and caused significant cognitive impairment.
Always prioritize healthy sleep habits!