Wellness
Total sleep from a cycle count
Each cycle is about 90 minutes, so the total is one and a half hours per cycle before subtracting the time to fall asleep.
The Formula
hours = 1.5 x cycles
Each cycle is about 90 minutes, so the total is one and a half hours per cycle before subtracting the time to fall asleep.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| h | Sleep | hours | Total time asleep, excluding the time to fall asleep. |
| n | Cycles | cycles | Number of 90 minute cycles. |
What Each Symbol Means
hhours
Sleep
Total time asleep, excluding the time to fall asleep.
ncycles
Cycles
Number of 90 minute cycles.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to calculate the best time to sleep page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Calculate The Best Time To Sleep, filed under Health. Every number the guide produces comes from substituting into this one line.