Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Medicine
Pack Years Calculator
Calculates cumulative smoking exposure in pack-years by multiplying daily cigarette packs by years smoked. Used by physicians to quantify lung cancer risk, COPD staging, and eligibility for lung cancer screening programs.
Fill in the required fields to see your result.
Medicine
Heart Rate Zone Calculator
Compute a target training heart rate using a Karvonen-style formula with resting heart rate, maximum heart rate estimated as 220 minus age, and a combined intensity factor (training zone Γ fitness level). Returns bpm.
Fill in the required fields to see your result.
Key differences
| Pack Years Calculator | Heart Rate Zone Calculator | |
|---|---|---|
| Category | Medicine | Medicine |
| Inputs required | 2 | 4 |
| Result | Pack Years (pack-years) | Target Heart Rate (bpm) |
| What it does | Calculates cumulative smoking exposure in pack-years by multiplying daily cigarette packs by years smoked. Used by physicians to quantify lung cancer risk, COPD staging, and eligibility for lung cancer screening programs. | Compute a target training heart rate using a Karvonen-style formula with resting heart rate, maximum heart rate estimated as 220 minus age, and a combined intensity factor (training zone Γ fitness level). Returns bpm. |