Free biological age test using 12 health biomarkers (BMI, VO2max, balance, strength). See if your body is younger than your chronological age.
CalcVita. (2026). Biological Age Test — Free Calculator. CalcVita. Retrieved July 5, 2026, from https://calcvita.com/en/calculators/biological-age
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Learn what biological age is, which biomarkers matter most, how epigenetic clocks work, and five evidence-based strategies to slow down your body's aging process.
Read the full article →Biological age reflects how fast your body is aging at a cellular and functional level, beyond your birth date. While chronological age simply counts the years since birth, biological age integrates multiple biomarkers that reveal the true health status of your body. Understanding this distinction matters because two people of the same chronological age can have vastly different risks of chronic disease and mortality depending on their lifestyle and genetics. Our calculator evaluates 12 indicators grouped into three dimensions: anthropometric (BMI, waist-to-height ratio, estimated body fat percentage, and ABSI body shape index), metabolic (estimated VO2max based on resting heart rate, age, sex, and activity level), and functional (one-leg balance test and Sit-to-Stand Test). The anthropometric model detects unfavorable body composition — particularly visceral fat accumulation — associated with accelerated aging and higher cardiovascular risk. VO2max, or maximal oxygen uptake, is one of the strongest predictors of all-cause mortality according to research from the NTNU (Norwegian University of Science and Technology); even modest improvements in cardiorespiratory fitness are associated with significant reductions in death risk. The functional tests assess neuromuscular balance and lower-limb strength, both linked to independence and longevity in studies published in the British Journal of Sports Medicine. A 2022 study in that journal found that the inability to complete the one-leg balance test was associated with nearly double the mortality risk over 7 years. Science confirms that these dimensions are modifiable. The epigenetic clocks by Horvath (2013) and PhenoAge by Levine et al. (2018) demonstrated that biological age can diverge significantly from chronological age, and a clinical trial by Fitzgerald et al. (2021) showed that an 8-week intervention combining diet, exercise, quality sleep, and stress management reduced epigenetic age by 3.23 years. Each partial result (anthropometric, metabolic, and functional age) is weighted to produce your overall biological age. If the result is lower than your chronological age, your habits are protecting your body; if higher, it points to specific areas for improvement. Recalculating every 3-6 months allows you to track progress objectively. Use this tool as a starting point for conversations with your healthcare provider and for setting measurable wellness goals.
We triangulate three biological "clocks": anthropometric (body shape), metabolic (estimated VO2max), and functional (balance and strength). Each contributes a partial age that we weight-average.
When functional tests are completed (one-leg balance and Sit-to-Stand), the overall biological age is calculated with the following weights: 40% functional age + 30% metabolic age + 30% anthropometric age. This higher functional weighting reflects the strong association between functional capacity and mortality demonstrated in British Journal of Sports Medicine studies (Araujo et al., 2022). When functional tests are not available, the calculation uses: 50% metabolic age + 50% anthropometric age. The anthropometric age integrates BMI, waist-to-height ratio, estimated body fat percentage, and ABSI index. The metabolic age is based on estimated VO2max using the NTNU formula. The functional age averages the balance-derived age and the Sit-to-Stand-derived age.
Biological age reflects your body's true physiological condition, beyond the chronological time elapsed since birth. While chronological age simply counts years lived, biological age integrates multiple biomarkers that reveal the functional state of your cells, tissues, and organs. Key biomarkers include: telomere length (the protective "caps" on chromosomes that shorten with aging), DNA methylation (epigenetic clocks that measure chemical modifications of the genome), inflammatory markers such as C-reactive protein (CRP) and interleukin-6 (IL-6), metabolic markers (fasting glucose, HbA1c, blood pressure, cholesterol), and functional measures like grip strength and VO2max. The epigenetic clocks developed by Horvath (2013) and PhenoAge by Levine et al. (2018) have proven to be robust predictors of morbidity and mortality, more accurate than chronological age alone.
Research shows that lifestyle interventions can measurably reduce biological age. Regular physical activity — at least 150 minutes per week of moderate exercise or 75 minutes of vigorous exercise — is associated with longer telomeres and a better metabolic profile. Mediterranean-type dietary patterns, rich in vegetables, fruits, legumes, fish, and olive oil, have been linked to lower systemic inflammation and slower epigenetic aging. Adequate sleep (7-9 hours per night) is essential for cellular repair and hormonal regulation. Stress management through techniques such as meditation or regular exercise reduces chronic cortisol, a known accelerator of aging. Avoiding tobacco and excessive alcohol consumption is also fundamental. A clinical trial by Fitzgerald et al. (2021) demonstrated that a combined diet and lifestyle intervention reversed epigenetic age by 3.23 years in just 8 weeks.
There are several clinical markers that can help assess your biological age and your cardiovascular and metabolic risk. The ideal ranges are:
It is important to note that trends over time are more meaningful than a single reading. Periodic assessment of these markers with your healthcare professional allows early detection of changes and proactive adjustment of lifestyle interventions or treatments.
WHO CVD Risk Chart Working Group. "World Health Organization cardiovascular disease risk charts." Lancet Glob Health. 2019;7:e1332-e1345.
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