Calculator Input
Enter your screening details below. This tool combines weighted risk points with a STOP-Bang style reference score.
Example Data Table
These sample entries show how different risk profiles can affect the weighted score and STOP-Bang reference.
| Example | Age | BMI | Neck | Symptoms Summary | Weighted Score | STOP-Bang | Risk Band |
|---|---|---|---|---|---|---|---|
| Case A | 28 | 22.1 | 34 cm | No snoring, no sleepiness, no observed pauses | 1 / 26 | 0 / 8 | Low |
| Case B | 47 | 31.0 | 42 cm | Frequent snoring, moderate sleepiness, hypertension | 15 / 26 | 5 / 8 | Moderate |
| Case C | 56 | 37.4 | 45 cm | Loud snoring, severe sleepiness, frequent pauses | 24 / 26 | 8 / 8 | Very High |
Formula Used
This tool uses a weighted screening model plus a STOP-Bang style reference. It is not a diagnosis engine.
- BMI formula: BMI = weight in kilograms ÷ (height in meters)2.
- Weighted score: Total Risk Score = sum of all factor points.
- Maximum weighted score: 26 points.
- Weighted bands: Low 0–5, Mildly Elevated 6–10, Moderate 11–15, High 16–20, Very High 21–26.
- STOP-Bang reference: 1 point each for snoring, tiredness, observed pauses, pressure, BMI over 35, age over 50, neck over 40 cm, and male sex at birth.
| Factor | Point Rule |
|---|---|
| Snoring severity | None 0, Occasional 1, Frequent 2, Loud 3 |
| Daytime sleepiness | None 0, Mild 1, Moderate 2, Severe 3 |
| Observed pauses | No 0, Rare 1, Weekly 2, Frequent 3 |
| High blood pressure | No 0, Yes 2 |
| BMI | <25 = 0, 25–29.9 = 1, 30–34.9 = 2, 35+ = 3 |
| Neck circumference | <37 = 0, 37–40.9 = 1, 41–43.9 = 2, 44+ = 3 |
| Age | <30 = 0, 30–49 = 1, 50+ = 2 |
| Sex at birth | Male 1, others 0 |
| Morning headaches | No 0, Yes 1 |
| Smoking status | Never 0, Former 0, Current 1 |
| Alcohol near bedtime | Never 0, Sometimes 1, Often 2 |
| Diabetes or metabolic syndrome | No 0, Yes 1 |
| Nasal blockage or congestion | No 0, Yes 1 |
How to Use This Calculator
- Select your preferred unit system before entering body measurements.
- Enter age, height, weight, and neck circumference as accurately as possible.
- Choose the symptom and health options that best match your recent pattern.
- Click Calculate Risk to generate the weighted score, STOP-Bang result, and graph.
- Review the factor breakdown to see which entries drive the result.
- Use the CSV or PDF buttons to save the summary for discussion or recordkeeping.
- Remember that this tool supports screening only and cannot replace professional evaluation.
FAQs
1) Does this calculator diagnose sleep apnea?
No. It estimates screening risk from common indicators. Diagnosis usually requires a clinician review and, in many cases, a formal sleep study.
2) Why does neck circumference matter?
A larger neck can reflect more soft tissue around the airway. That may increase the chance of collapse during sleep, especially when combined with snoring and daytime fatigue.
3) What is STOP-Bang?
STOP-Bang is a widely used sleep apnea screening framework. It checks snoring, tiredness, observed pauses, pressure, BMI, age, neck size, and sex at birth.
4) Can a low score still miss a problem?
Yes. Some people with lower screening scores still have clinically meaningful sleep apnea. Persistent symptoms deserve medical attention, even when a calculator suggests lower risk.
5) Why are both a weighted score and STOP-Bang shown?
The weighted score gives more detail across several factors. The STOP-Bang result provides a familiar reference point for quick screening comparison.
6) Does BMI alone decide the result?
No. BMI is important, but symptoms, observed breathing pauses, blood pressure, neck size, and other factors also affect the final screening profile.
7) When should someone seek medical advice?
Seek advice if you have loud snoring, choking, witnessed breathing pauses, high sleepiness, resistant blood pressure, or if the calculator returns high or very high risk.
8) Can lifestyle changes lower risk?
Sometimes. Weight management, less bedtime alcohol, better nasal airflow, and proper sleep positioning may help. Medical treatment may still be needed for confirmed cases.