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Lung Cancer Risk Calculator

Work out lung cancer risk instantly with clear inputs, formula shown and shareable results.

About Lung Cancer Risk Calculator

Checks smoking history against the three USPSTF 2021 lung cancer screening criteria: age 50 to 80, at least 20 pack years and quitting within the past 15 years.

Formula

USPSTF 2021 criteria

Annual low-dose CT is recommended for adults aged 50-80 with a 20 pack-year history who currently smoke or quit within the past 15 years

Worked example

With the default values below, Lung Cancer Risk Calculator returns Screening eligibility of Meets the USPSTF 2021 criteria for annual low-dose CT screening. Change any input above and every figure here is recalculated in your browser.

Inputs used

Ageaccepts 30–90 years
60 years
Pack yearsaccepts 0–200
25
Years since quittingaccepts 0–60
8

Results

Screening eligibility
Meets the USPSTF 2021 criteria for annual low-dose CT screening
Criteria met of three
3
Exposure criterion
20 pack years or more
Cessation criterion
Within 15 years of quitting or still smoking

Step by step

  1. 1Values used
  2. 2USPSTF 2021 criteria
  3. 3Screening eligibility= Meets the USPSTF 2021 criteria for annual low-dose CT screening
  4. 4Criteria met of three= 3
  5. 5Exposure criterion= 20 pack years or more
  6. 6Cessation criterion= Within 15 years of quitting or still smoking

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Why not give a risk percentage?

Individual risk models such as PLCOm2012 need many more variables; eligibility criteria are the actionable, citable rule.

Does screening stop at 80?

Screening stops at 80, or earlier if a health problem would prevent curative treatment.

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