Healthspan (healthy life expectancy) is the number of years lived in good health, free of serious disease and functional limitations. It is contrasted with lifespan — the total length of life.
The point is simple: what matters is not only how many years you live, but how many of them you stay active and independent. Extending longevity without health is a questionable goal.
Healthspan versus lifespan
The WHO measures healthy life with HALE (healthy life expectancy) — the expected number of years in "full health", not counting years lived with illness or injury. The difference between total life expectancy and HALE is the years spent in poor health; worldwide this averages around 8–10 years.
Compression of morbidity
The key idea is the "compression of morbidity" (Fries's hypothesis, 1980): if the onset of the first chronic disease is pushed closer to the end of life, the period of frailty shrinks and healthspan approaches lifespan. In practice this means early prevention of heart disease, diabetes, sarcopenia and dementia.
How to expand healthspan
The same measures work as for longevity: physical activity and strength training, a balanced diet, quitting smoking, weight control, control of blood pressure and blood sugar, adequate sleep and social ties. Biological age helps track progress: the more slowly it rises relative to your calendar age, the longer health is preserved.
Calculate using this marker
Calculators where Healthspan is used directly:
Frequently asked questions
How does healthspan differ from life expectancy?
Lifespan is all the years lived, whereas healthspan is only the years in good health. The gap between them (on average 8–10 years worldwide) is the time lived with illness and limitations.
How can you measure your healthspan?
There is no precise personal figure, but it is indirectly reflected by biological age, physical fitness (VO2max, strength), the absence of chronic diseases and of risk factors. Those are what to track.