🌙 Sleep Science Tool
REM Sleep Calculator
Estimate your REM sleep & sleep cycles in seconds
⚠ Please enter a value between 0.5 and 24 hours.
⚠ Wake-up time must differ from bedtime.
Ideal sleep duration for adults: 7–9 hours per night (National Sleep Foundation)
Your sleep estimate
Total Sleep
—
— min
Sleep Cycles
—
× 90 min each
REM Sleep
—
— min range
—
REM proportion per cycle (increases each cycle)