Your birthday says one number.
Your body says another.
Two people born the same year can be a decade apart on the inside. Answer a few questions and see how fast you're really aging, then learn how to turn the clock back.
Biological Age Test
Based on the markers longevity researchers track most
What's aging you, and what's protecting you
This test is a snapshot in time. Your real biological age shifts every single day with your heart rate, recovery, sleep and body composition. The Hume Band 2.0 measures those exact markers 24/7, so you can watch your biological age drop, week after week.
See how the Hume Band tracks itSee the Hume Band→As featured in
Biological age is how old your body acts, not how long it's been here
Chronological age is fixed. Biological age isn't. It reflects the wear on your heart, cells and metabolism, and unlike your birthday, you can move it in either direction.
Chronological age
The candles on your cake. It only ever counts up, one year at a time, no matter what you do.
Biological age
How well your body is actually running, measured through heart, metabolism, recovery and body composition.
The good news
Studies suggest lifestyle drives most of how you age. The right habits can peel years off your biological age.
A quiz gives you an estimate. The Hume Band gives you the real number, every day.
Your biological age is driven by markers that change hour to hour. The Hume Band 2.0 reads them continuously and turns them into one clear score you can actually move.
The wearable that actually reads what ages you
Medical-grade sensors in a featherlight fabric band you'll forget you're wearing.
14-day battery life
Charge it twice a month. It captures the trends short-lived charges miss.
Lab-grade accuracy
Wrist-based sensors validated against clinical references for heart rate and body metrics.
Hume Band 2.0
Your biological age isn't a life sentence, it's a dashboard. Get the one that reads it 24/7.
- Continuous heart rate, HRV & recovery tracking
- Body composition & metabolic insights
- One Health Score that shows your progress
- No mandatory subscription to see your data
People are watching their number drop
"My calculator age came back at 47. I'm 39. Six months on the band later, my recovery and resting heart rate are night and day. Genuinely feel younger."
"I finally understand what my sleep and stress were doing to me. Seeing the Health Score climb every week is weirdly addictive, in a good way."
"Switched from another tracker. The insights are on another level, actually actionable, not just step counts. Best health purchase I've made."
Biological age, answered
We start from your real age and adjust it using the lifestyle and body markers longevity researchers weigh most heavily: heart rate, body composition, activity, sleep, and habits like smoking, alcohol, diet and stress. Each answer nudges your estimate up or down. It's a directional estimate to show where you stand, not a medical diagnosis.
No. Clinical biological-age tests use blood biomarkers, but this calculator estimates your age from lifestyle and body inputs you already know, so you get an answer in under a minute, for free.
Yes, that's the whole point. Because biological age reflects how your body is running today, improving sleep, movement, recovery and body composition can bring it down over weeks and months. The hard part is knowing what's working, which is exactly what the Hume Band 2.0 tracks.
The calculator is a one-time snapshot. The Hume Band measures the same markers continuously (heart rate, HRV, recovery, sleep and body composition) and rolls them into a single Health Score. Instead of guessing once a year, you see your number move in real time.
The calculator runs entirely in your browser. Nothing you enter is uploaded, stored or shared. The result is generated on your device and disappears when you close the page.
Know your number. Then change it.
You just saw where you stand. The Hume Band 2.0 helps you move it, one day at a time.