Precision Sleep Tools
Science-backed calculators designed to align your rest with your body's natural circadian rhythm.
Power Nap Calculator
Find the ideal nap length (20, 30, 60, 90 mins) to boost energy without grogginess.
Sleep Cycle Calculator
Plan your sleep in 90-minute cycles to wake up feeling refreshed and energized.
Sleep by Age Calculator
Calculate how many hours of sleep you need based on your age for optimal health.
Bedtime Calculator
Determine the best time to go to sleep based on your wake-up schedule.
WakeUp Time Calculator
Find the perfect wake-up time calculated from your sleep cycles.
Sleep Debt Calculator
Estimate your accumulated sleep debt and learn how to recover effectively.
REM Sleep Calculator
Optimize your sleep for maximum REM stages to improve memory and focus.
Why Use Sleep Calculators?
Modern life often clashes with our circadian rhythm. Whether you are a shift worker, a student, or a busy professional, timing your sleep cycles is the most effective way to improve cognitive function and physical health.
[Image of a human circadian rhythm chart showing sleep/wake cycles]Our tools use the standard 90-minute sleep cycle model, used by sleep scientists worldwide to help individuals avoid sleep inertia—that heavy, groggy feeling you get when waking up from the wrong stage of sleep.