Heaviness of Smoking Index Calculator
Health & FitnessCalculate the Heaviness of Smoking Index (HSI), a quick 2-question measure of nicotine dependence.
HSI Score
Total Heaviness of Smoking Index score out of 6. Educational reference only, not a substitute for clinical judgment.
Dependence Category
Medium dependence
General nicotine dependence category based on the total score.
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Frequently Asked Questions
What is the Heaviness of Smoking Index used for?
The HSI is a brief 2-question screening tool that estimates nicotine dependence severity, often used to help tailor smoking cessation support and predict how difficult quitting may be.
Why is time to first cigarette weighted so heavily?
How quickly a person needs a cigarette after waking is considered one of the strongest single indicators of nicotine dependence, reflecting how the body has adapted overnight without nicotine.
How does HSI relate to the Fagerstrom Test?
HSI is essentially a shortened version of the longer Fagerstrom Test for Nicotine Dependence, using just 2 of its original 6 questions while retaining reasonable predictive accuracy.
Is this calculator a substitute for medical advice?
No. This is an educational reference implementation of the standard Heaviness of Smoking Index, not a substitute for guidance from a healthcare provider or smoking cessation program.
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