Biological Age Estimator

A free, private estimate of how old your habits make you — and what to change. Your answers never leave your device.

How old are you, really?

Your birthday is fixed, but how you live tilts your biological age up or down. This gives you a transparent estimate from a handful of modifiable habits — and shows exactly what's adding or subtracting years. Educational, not a lab test.

Your habits

Fill in what you can — more inputs, sharper estimate. Nothing is saved; it runs on your device.

Age (years)Exercise (days/week)Resting heart rate (bpm)SmokingAlcohol (drinks/week)Sleep (hours/night)Diet qualityWaist (in)Height (in)Stress

Enter your age (and a few habits) to see your estimate.

This is an educational estimate from self-reported habits — not a clinical or epigenetic biological-age test, and not medical advice. Use it as motivation, and discuss health concerns with a licensed clinician.