Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

A1C Calculator

Convert HbA1c to estimated average blood glucose (eAG) or the other way, using the ADAG standard formula. Interpretation bands cover normal, prediabetes, and diabetes thresholds.

Direction

HbA1c (%)

Average glucose (eAG) (mg/dL)

Fill in the required fields to see your result.

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.

Packs per Day (packs)

Years Smoked (years)

Fill in the required fields to see your result.

Key differences

	A1C Calculator	Pack Years Calculator
Category	Medicine	Medicine
Inputs required	3	2
Result	Estimated result	Pack Years (pack-years)
What it does	Convert HbA1c to estimated average blood glucose (eAG) or the other way, using the ADAG standard formula. Interpretation bands cover normal, prediabetes, and diabetes thresholds.	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.