Estimate your biological age from seven lifestyle factors — exercise, smoking, sleep, diet, alcohol, stress, and body weight — based on how each is linked to healthy ageing.
Biological age is a measure of how well your body is functioning compared to your chronological age. This calculator applies year-based adjustments for seven lifestyle factors that longevity research consistently links to health outcomes: regular vigorous exercise and high-quality diets are associated with slower biological ageing, while smoking, chronic sleep deprivation, heavy alcohol use, sustained stress, and obesity are associated with faster ageing.
The strongest single factor is smoking — current smokers show markers consistent with roughly five additional years of ageing — followed by physical inactivity and obesity. The good news: most factors are modifiable, and studies show measurable improvement in ageing biomarkers within months of lifestyle change. This tool provides an indicative estimate only; clinical biological age testing uses blood biomarkers, DNA methylation, and other laboratory measures.
This free biological age calculator runs entirely in your browser using standard mathematical formulas. Enter your figures, tap Calculate, and results update instantly — no signup required.
Figures are estimates for general information. Always verify important decisions with a qualified professional where relevant.