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Two-Question Heaviness of Smoking Score

This questionnaire applies to current or recent cigarette smokers.

  • Formula & worked example
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Use the result with context

Health results are educational estimates, not a diagnosis or treatment recommendation. A qualified clinician can interpret measurements in the context of your health.

Formula and method

First cigarette after 6–30 minutes gives 2 points; 11–20 cigarettes daily gives 1 point; the total is 3.

HSI = the 0–3 time-to-first-cigarette score plus the 0–3 cigarettes-per-day score.

Worked example

Enter these known values and leave the other values blank.

Time to first cigarette after waking
6-30 min
Cigarettes per day
11-20
HSI score (0–6)
3

Assumptions and limitations

  • This questionnaire applies to current or recent cigarette smokers. It is not a vaping or smokeless-tobacco scale. NIDA describes low scores 0–1, medium 2–4 and high 5–6; these score bands are not a diagnosis or a treatment prescription.
  • Clear an unknown control before solving the supported arithmetic relationship.
  • This model does not select medical treatment or establish a diagnosis.

Common questions

How is the result calculated?

HSI = the 0–3 time-to-first-cigarette score plus the 0–3 cigarettes-per-day score.

When does this model apply?

This questionnaire applies to current or recent cigarette smokers. It is not a vaping or smokeless-tobacco scale. NIDA describes low scores 0–1, medium 2–4 and high 5–6; these score bands are not a diagnosis or a treatment prescription.

References

Bookify adds independently reviewed bounds: total >= 0 and total <= 6 and isInteger(total). HSI note bands use NIDA low 0–1, medium 2–4 and high 5–6, replacing the captured low-through-2 split.

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