Free HSI Calculator
Answer the 2 questions and click Calculate to see your HSI score and dependency level
The Heaviness of Smoking Index (HSI) calculator offers a quick, two-question assessment of nicotine dependence. Unlike longer questionnaires, this smoking addiction assessment delivers a clear classification—low, medium, or high—based on your responses. Often referred to as an HSI score calculator or nicotine addiction questionnaire, it is widely used in both clinical settings and population surveys.
Nicotine dependence arises when the body requires the chemical to function normally, making it difficult to quit. Found naturally in tobacco, nicotine produces rewarding effects in the brain that reinforce continued use. Cigarettes, a primary source of nicotine, are strongly linked to serious conditions such as lung cancer, chronic obstructive pulmonary disease, and heart disease. Regardless of how long you have smoked, quitting can significantly improve your health.
How the HSI works
The HSI relies on just two questions, each scored from 0 to 3 points, for a total possible score of 6.
Question 1: How soon after you wake up do you smoke your first cigarette?
| Time | Points |
|---|---|
| Within 5 minutes | 3 |
| 6–30 minutes | 2 |
| 31–60 minutes | 1 |
| After 60 minutes | 0 |
Question 2: How many cigarettes do you smoke per day?
| Cigarettes per day | Points |
|---|---|
| 10 or fewer | 0 |
| 11–20 | 1 |
| 21–30 | 2 |
| 31 or more | 3 |
Interpreting the HSI score
The total score places your nicotine dependence into one of three categories:
- Low (0–2 points)
- Medium (3–4 points)
- High (5–6 points)
A higher score indicates a greater level of addiction. The HSI is particularly valued for its brevity and predictive ability regarding smoking cessation outcomes.
Using the HSI calculator
Using the tool is straightforward: select your answer for each question from the provided options. The calculator instantly computes your total score and shows the corresponding dependence level. While this HSI score calculator offers a convenient starting point, it cannot replace a professional medical evaluation. If you have health concerns, consult a physician.
FAQ
1. How is the HSI score calculated?
The HSI score is the sum of points from two questions. The first question asks how soon after waking you smoke your first cigarette (0–3 points). The second asks how many cigarettes you smoke per day (0–3 points). The total ranges from 0 to 6, with higher scores indicating greater dependence.
2. What do the different HSI score ranges mean?
A score of 0–2 indicates low nicotine dependence, 3–4 indicates medium dependence, and 5–6 indicates high dependence. These classifications help gauge the severity of addiction and can guide cessation strategies.
3. Is the Heaviness of Smoking Index a reliable measure of nicotine dependence?
Yes, the HSI is widely used in clinical practice and research. Its two-question format provides a quick yet valid assessment of addiction severity and is often as effective as longer questionnaires like the Fagerström Test for Nicotine Dependence.
How to Use
- Select the option that best describes how soon after waking you have your first cigarette.
- Select how many cigarettes you typically smoke per day.
- Click Calculate to see your Heaviness of Smoking Index score and nicotine dependence level.