Find out if your body is aging faster or slower than your birth year suggests — using resting heart rate, sleep, steps, and lifestyle factors.
| Category | Delta | Interpretation |
|---|---|---|
| Excellent | ≥ 5 years younger | Your lifestyle habits are strongly protective. Keep it up. |
| Good | 1–4 years younger | You are aging slower than average. Small improvements could push you to Excellent. |
| Average | Same ± 0 years | Your biological age matches your chronological age. There is room to improve. |
| Review Needed | +2 to +4 years older | Some lifestyle factors may be accelerating your biological age. Focus on sleep, steps, and exercise. |
| High Concern | +5 or more years older | Multiple factors are significantly impacting your biological age. Consider consulting a healthcare professional. |
Biological age (also called physiological age) is an estimate of how old your body is based on measurable health markers, as opposed to your chronological age, which simply counts years since birth. Two people of the same chronological age can have very different biological ages depending on lifestyle, genetics, and health habits.
This calculator uses a simplified model inspired by PhenoAge research. It starts with your chronological age and applies adjustments based on resting heart rate, sleep duration, daily step count, smoking status, and exercise frequency. Each factor has been linked to mortality and aging biomarkers in population studies. The result is an estimate, not a clinical diagnosis.
Yes. Biological age is not fixed. Studies show that sustained improvements in physical activity, sleep quality, diet, and avoiding smoking can measurably lower biological aging markers over months. Even modest changes — like adding 2,000 daily steps or improving sleep to 7-9 hours — can make a meaningful difference.
Resting heart rate (RHR) is one of the strongest predictors of cardiovascular fitness and longevity. A lower RHR generally means your heart is more efficient. Elite athletes often have RHRs below 50 bpm. Research shows that every 10 bpm increase in RHR is associated with a meaningful rise in cardiovascular mortality risk, which is why this calculator adjusts biological age based on your RHR range.
HC Webhook sends your resting heart rate, sleep, and step data to any endpoint on a schedule — so your dashboards always reflect the real you.
