Sleep Cycle & Wake Time Calculator vs REM Sleep Cycle Calculator
Two calculators for the same neighbourhood of questions. Here is what each measures, what you feed in, and where you'd reach for one over the other.
Sleep Cycle & Wake Time Calculator
Work backward from your desired wake time to find the ideal bedtime based on your age and sleep quality factors. Use this to wake up at the end of a sleep cycle feeling naturally refreshed.
- Answers
- Optimal Bedtime (hours before midnight)
- Inputs
- Age, Desired Wake Time (Hour), Desired Wake Time (Minutes), Sleep Quality Factors
REM Sleep Cycle Calculator
Find the ideal bedtime to wake up refreshed by aligning your alarm with the end of a complete 90-minute sleep cycle. Use it any night you want to avoid that groggy, mid-cycle wake-up feeling.
- Answers
- Total Sleep Duration (minutes)
- Inputs
- Number of Sleep Cycles, Time to Fall Asleep, Personal Cycle Length
At a glance
| Sleep Cycle & Wake Time Calculator | REM Sleep Cycle Calculator | |
|---|---|---|
| Category | Health | Sleep |
| Answers | Optimal Bedtime | Total Sleep Duration |
| Inputs | 4 | 3 |
| Result unit | hours before midnight | minutes |
When to use each
Work backward from your desired wake time to find the ideal bedtime based on your age and sleep quality factors. Use this to wake up at the end of a sleep cycle feeling naturally refreshed.
Find the ideal bedtime to wake up refreshed by aligning your alarm with the end of a complete 90-minute sleep cycle. Use it any night you want to avoid that groggy, mid-cycle wake-up feeling.