Understanding Sleep Cycles

Our sleep calculator is based on the science of sleep cycles, which typically last 90 minutes. During each cycle, you progress through different stages of sleep, from light sleep to deep sleep and REM sleep. Waking up at the end of a complete cycle helps you feel more refreshed and alert.

How the Sleep Calculator Works

Sleep Cycle Timing

The calculator uses 90-minute sleep cycles to determine optimal bedtimes and wake times. It also accounts for the average 15 minutes it takes to fall asleep.

Age-Based Recommendations

Sleep needs vary by age group. The calculator uses guidelines from sleep research organizations to provide age-appropriate recommendations.

Sleep Requirements by Age

Newborns (0-3 months): 14-17 hours
Infants (4-11 months): 12-15 hours
Toddlers (1-2 years): 11-14 hours
Preschoolers (3-5 years): 10-13 hours
School age (6-13 years): 9-11 hours
Teenagers (14-17 years): 8-10 hours
Adults (18-64 years): 7-9 hours
Older adults (65+ years): 7-8 hours

Tips for Better Sleep

Maintain a consistent sleep schedule, even on weekends
Create a relaxing bedtime routine
Keep your bedroom cool, dark, and quiet
Avoid caffeine, large meals, and screens before bedtime
Get regular exercise, but not close to bedtime
Expose yourself to bright light in the morning
Limit daytime naps to 20-30 minutes

Note: This calculator provides general recommendations based on sleep science. Individual sleep needs may vary. If you consistently have trouble sleeping or feel tired despite adequate sleep time, consult with a healthcare professional or sleep specialist.