Chronological Age vs Biological Age: What's the Difference?

Chronological age is the number of years, months, and days since your birth. It ticks forward at exactly 1 second per second for everyone.

Biological age measures how old your cells and tissues appear based on biomarkers like telomere length, DNA methylation, and cellular health. Two people of the same chronological age can have very different biological ages.

Factors that influence biological age include diet, exercise, sleep quality, stress levels, and genetics. Some studies suggest lifestyle changes can reverse biological age by several years.

While we can't change our chronological age, understanding both measures gives a fuller picture of health and longevity.

Use our age calculator to track your chronological age precisely, and consult a healthcare provider to assess your biological age.