Overview
Getting 8 hours of low-quality sleep leaves you more tired than 6 hours of deep uninterrupted sleep. Understanding sleep architecture explains why.
The Formula
Bedtime = Wake time โ (Cycles ร 90min) โ 14min fall-asleep time
Standard formula used by professionals worldwide
Worked Example
Step-by-step
Wake at 6:30am โ best bedtimes: 9:16pm (6 cycles), 10:46pm (5 cycles), 12:16am (4 cycles)
Key Concepts
- Accuracy: Results are as accurate as the inputs you provide
- Units: Always use consistent units throughout your calculation
- Verification: Double-check important calculations before making decisions
- Professional advice: For major financial, health, or structural decisions, consult a qualified professional
Privacy and Security
- All calculations run entirely in your browser
- No data is sent to any server
- No sign-up or personal information required
- Your data stays private โ always
Frequently Asked Questions
What happens during REM?
Brain processes emotions and memories. Most dreaming occurs in REM.
Is 20-min nap beneficial?
Yes โ under 20 minutes improves alertness without causing grogginess.
Why do teenagers need more sleep?
Still-developing brains and naturally delayed circadian rhythms require 8-10 hours.