Enter Sleep Data
The result appears above this form after submission. This tool supports screening and self-review, not diagnosis.
Formula used
Time in Bed = time from bedtime to wake time, adjusted across midnight when needed.
Sleep Efficiency (%) = (Total Sleep Hours ÷ Time in Bed Hours) × 100.
Continuity Score = average of wake-after-sleep-onset score and awakenings score.
Architecture Score = average of deep sleep and REM balance scores against common adult reference ranges.
Hygiene Score considers caffeine timing, screens, naps, stress, and exercise frequency.
Daytime Impact Score reduces points for stronger sleepiness and more frequent snoring.
Overall Score = 25% efficiency + 20% duration + 15% continuity + 10% onset + 10% architecture + 10% hygiene + 10% daytime impact.
How to use this calculator
- Enter bedtime and wake time from a typical recent night.
- Add your best estimate of actual sleep hours, not just time spent in bed.
- Fill in latency, awake minutes overnight, and number of awakenings.
- Include deep sleep and REM percentages if you use a wearable or sleep tracker.
- Report evening habits like caffeine, screen exposure, naps, and stress.
- Submit the form to view the score, risk flags, and graph above the form.
- Use several nights of data for a stronger pattern review instead of relying on one night only.
Example data table
| Case | Time in Bed | Total Sleep | Efficiency | Latency | WASO | Deep % | REM % | Overall Score | Category |
|---|---|---|---|---|---|---|---|---|---|
| Case A | 7.75 hrs | 7.20 hrs | 92.9% | 12 min | 18 min | 20% | 23% | 89.4 | Excellent |
| Case B | 8.00 hrs | 6.70 hrs | 83.8% | 28 min | 38 min | 16% | 21% | 72.6 | Good |
| Case C | 8.25 hrs | 6.10 hrs | 73.9% | 42 min | 54 min | 12% | 19% | 58.8 | Fair |
| Case D | 7.40 hrs | 5.50 hrs | 74.3% | 60 min | 80 min | 10% | 17% | 43.2 | Poor |
| Case E | 9.10 hrs | 7.80 hrs | 85.7% | 18 min | 30 min | 18% | 24% | 81.1 | Good |
Frequently asked questions
1. What does sleep efficiency mean?
Sleep efficiency compares actual sleep time with total time spent in bed. Higher percentages usually suggest more consolidated sleep. Lower percentages can reflect trouble falling asleep, frequent awakenings, or extended awake time overnight.
2. What is a good sleep quality score?
In this tool, 85 or higher is excellent, 70 to 84.9 is good, 55 to 69.9 is fair, and under 55 is poor. Trends across several nights matter more than one isolated score.
3. Can wearable data be used here?
Yes. If your device estimates deep sleep and REM sleep, you can enter those percentages. Device estimates vary, so they are best used for pattern tracking rather than strict medical diagnosis.
4. Why are naps included in the score?
Long or late naps can reduce homeostatic sleep pressure, making it harder to fall asleep at night. Short earlier naps may be fine, but frequent long naps can affect nighttime sleep quality.
5. Why does the tool ask about snoring?
Frequent snoring can be associated with disrupted sleep and may signal breathing-related sleep issues. Snoring alone is not diagnostic, but regular loud snoring deserves closer medical attention.
6. How often should I use this tool?
Use it for multiple nights, ideally a week or more. That helps smooth out unusual nights and gives a better view of typical sleep habits, recovery patterns, and daytime impact.
7. Can high stress really affect deep sleep?
Stress can delay sleep onset, increase overnight awakenings, and reduce restorative sleep quality. It may not always change tracker numbers reliably, but it often affects how refreshed you feel.
8. When should I talk to a clinician?
Speak with a clinician if you have persistent insomnia, heavy snoring, witnessed breathing pauses, severe daytime sleepiness, morning headaches, or sleep problems that affect safety, mood, or daily function.