STOP-BANG Sleep Apnea Calculator

Enter Calculation

Do you Snore loudly (louder than talking or heard through closed doors)? Yes No

Do you often feel Tired, fatigued, or sleepy during the daytime? Yes No

Has anyone Observed you stop breathing or choking/gasping during sleep? Yes No

Do you have or are being treated for high blood Pressure? Yes No

Is your BMI more than 35 kg/m²? Yes No

Is your Age over 50 years old? Yes No

Is your Neck circumference more than 40 cm (16 in)? Yes No

Gender: are you male? Yes No

Formula

Results

STOP-BANG Score

0

out of 8

Risk category	Low risk of obstructive sleep apnea
0–2	Low risk
3–4	Intermediate risk
5–8	High risk

What is the STOP-BANG questionnaire?

STOP-BANG is a widely used screening tool for obstructive sleep apnea (OSA). It is a simple eight-item yes/no questionnaire, where each "yes" answer scores one point. The total score ranges from 0 to 8 and places a person into a low, intermediate, or high risk category. The acronym stands for Snore, Tired, Observed apnea, Pressure (high blood pressure), BMI over 35, Age over 50, Neck circumference over 40 cm, and Gender (male).

The eight STOP-BANG factors: Snoring, Tiredness, Observed apnea, Pressure, BMI, Age, Neck circumference, and Gender.

How to use this calculator

Answer each of the eight questions with Yes or No. The calculator adds up the "yes" responses and instantly shows your total score and risk band. This is an awareness and screening tool only — it does not diagnose sleep apnea. If your score is intermediate or high, talk to a healthcare professional about a formal sleep evaluation.

The formula explained

Each affirmative answer contributes exactly one point. The score is the plain sum of all eight items:

$$\text{Score} = \text{S} + \text{T} + \text{O} + \text{P} + \text{B} + \text{A} + \text{N} + \text{G}$$

Equivalently, the score is the count of affirmative answers:

$$\text{Score} = \sum_{i=1}^{8} \text{yes}_i,\quad 0 \le \text{Score} \le 8$$

Interpretation follows the commonly cited cut-offs: a score of 0–2 indicates low risk, 3–4 indicates intermediate risk, and 5–8 indicates high risk of moderate-to-severe OSA.

STOP-BANG score bands: low (0–2), intermediate (3–4), and high (5–8) risk.

Worked example

Suppose someone snores loudly (1), feels tired during the day (1), has been observed to stop breathing (1), is being treated for high blood pressure (1), has a BMI under 35 (0), is over 50 (1), has a neck over 40 cm (0), and is male (1). The total is $$1+1+1+1+0+1+0+1 = 6$$ which falls in the high-risk band.

FAQ

Is a high STOP-BANG score a diagnosis? No. It only signals elevated risk and suggests further testing, typically a sleep study (polysomnography).

Why does gender count as a point? Epidemiologically, men have a higher prevalence of OSA, so male sex adds one point in the validated scoring.

What if I'm unsure about my BMI or neck size? \(\text{BMI} = \text{weight(kg)} \div \text{height(m)}^2\). Measure neck circumference around the Adam's apple. If unsure, answer "No" to avoid overstating risk and confirm the measurement later.