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Brinkman Index (Smoking Index) Calculator

Calculate your Brinkman Index (smoking index) from cigarettes per day and years smoked. Compare it against the 400, 600, and 1200 thresholds to see a rough smoking-risk category, total cigarettes, and pack-years.

Input

The Brinkman Index (smoking index) is calculated as "cigarettes per day × years smoked." It is a rough indicator of smoking-related risk, not a medical diagnosis.

cig.
yr

Result

Brinkman Index (smoking index)

400

Risk level:Increased risk

Risk category

Increased risk

Total cigarettes (est.)

~146,000 cigarettes

Pack-years

20.0 pack-years

The range where the risk of lung cancer and other diseases is considered to begin rising.

Risk guide by Brinkman Index

CategoryIndex range
Relatively lowUnder 400
Increased risk (your range)400–600
High risk600–1,200
Very high risk1,200 and over

Smoking-related risk is reported to decline over time after quitting. If you are concerned about smoking, consider consulting a smoking-cessation clinic or medical professional. This result is a general estimate, not a diagnosis or medical advice.

How it works

  • The Brinkman Index (smoking index) is calculated as "cigarettes per day × years smoked." It captures the cumulative amount of smoking in a single number.
  • As a rough guide, a value of 400 or more is generally said to mark where lung-cancer and similar risks begin to rise, 600 or more is high risk, and 1200 or more carries a larger risk of laryngeal cancer and others. These figures are approximate.
  • Total cigarettes is estimated as "cigarettes per day × years × 365 days." Because actual consumption varies, treat it as an approximate reference value.
  • Pack-years, also shown, is calculated as "cigarettes per day ÷ 20 × years" and represents years of smoking in one-pack-a-day terms—an internationally common indicator.
  • Smoking-related risk is reported to decline over time after quitting. If you are concerned about smoking, consider consulting a smoking-cessation clinic or medical professional.
  • This tool's result is a rough guide based on a general formula and is not a medical diagnosis or treatment. Always consult a physician or other professional to assess your health.