Biological Age Calculator

Your birthday tells you how many years you have lived. Your biological age tells you how old your body acts. Answer six quick questions to get an estimate — and see what is pushing it up or down.

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estimated biological age

    Want the real number?

    This is a rough estimate from six inputs. Your true VitalNexa Biological Age™ reads your actual blood work and wearable data — and shows you exactly what to change.

    Get your VitalNexa Biological Age — free

    How this estimate works

    The calculator starts from your real age, then nudges it up or down based on six things that research links to how fast people age: resting heart rate, waist size relative to height, how much you move, how you sleep, and whether you smoke. A lower resting heart rate, a trimmer waist, regular exercise, and steady 7–8 hour nights all pull the number down. A high resting heart rate, a large waist, little movement, poor sleep, and smoking push it up.

    It is a quick screen, not a lab test. It cannot see your cholesterol, blood sugar, inflammation, or hormones — the markers that carry the most weight. That is what the full VitalNexa Biological Age™ reads, from your labs and your Oura, WHOOP, Dexcom, Withings, Ultrahuman, or Apple Health data.

    Questions people ask

    What is biological age?+
    Biological age is an estimate of how old your body works, based on your health data rather than your birth date. Two people born the same year can have biological ages years apart, because habits, fitness, and biomarkers age the body at different speeds. It is meant to be tracked over time so you can see whether your choices are helping or hurting.
    How accurate is this calculator?+
    Treat it as a rough screen, not a diagnosis. It uses six inputs you can answer without a lab, so it captures broad strokes — heart rate, body shape, movement, sleep, smoking — but not your blood work. A full biological age reads markers like ApoB, hs-CRP, HbA1c, and fasting insulin, which this cannot see. For a real number, VitalNexa uses your labs and wearable data.
    How can I lower my biological age?+
    The levers with the most evidence are simple: move most days (aim for 150+ minutes a week, plus strength work), keep your waist under half your height, sleep 7–8 hours, do not smoke, and keep your metabolic markers in range. Small, steady changes move the number more than any single fix. Tracking it over months shows you what is working.
    Is this medical advice?+
    No. This tool is for information and education only. It is not a diagnosis and does not replace a doctor. If a result worries you, or you have symptoms or a known condition, talk to a qualified clinician.