HSI (Heaviness of Smoking)
HSI (Heaviness of Smoking): calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.
ℹ Reference calculation based on the published method. It does not replace a clinical examination or a doctor's decision.
HSI (Heaviness of Smoking)
Minutes after waking until the first cigarettemin
Cigarettes per day
HSI score
3
Heaviness of smoking
Moderate dependence
Cigarettes per year
5475
More about: HSI (Heaviness of Smoking)
What it calculates
The “HSI (Heaviness of Smoking)” calculator computes HSI score from 2 parameters: minutes after waking until the first cigarette (min), cigarettes per day.
Used by professionals and patients to assess health metrics, dosages, and risks.
Example calculation
With parameters Minutes after waking until the first cigarette = 20 min, Cigarettes per day = 15 the result is 3.
How to use
- Enter minutes after waking until the first cigarette and cigarettes per day — each field above is adjustable with a slider.
- HSI score is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is BMI calculated?
BMI = weight (kg) / height (m)². Example: 70 kg / (1.75 m)² = 22.9. The WHO normal range is 18.5–24.9; below that is underweight, 25–29.9 is overweight, and 30+ is obese.
Is BMI accurate for everyone?
No. BMI does not distinguish muscle from fat, so athletes may show a high BMI with low body fat. It is also less reliable for teenagers, pregnant people, older adults, and very tall or short individuals.
What are the BMI categories?
Underweight: below 18.5. Normal: 18.5–24.9. Overweight: 25–29.9. Obese class I: 30–34.9; class II: 35–39.9; class III: 40+.
What is a better measure than BMI?
Body fat percentage, waist-to-height ratio (aim for under 0.5), and waist circumference give a clearer picture of health than BMI alone.
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