Free · 90 seconds · no sign-up
Where do you rank vs 100 men your age?
Height, strength, fitness age and 22 more stats. Each one measured against real population data, with the study shown underneath.
- CDC NHANES
- NCD-RisC · 200 countries
- FRIEND Registry
- HUNT Study, NTNU
- JAMA Netw Open
- Br J Sports Med
Explore before you test
What “average” really looks like
Six measurements, straight from the largest published datasets. Tap through, then see where you land.
The studies behind the test
Eight findings the test is built on
Every test in Hundred comes from a study like these. Charts are drawn to scale; sample size and follow-up are shown for each.
What you get, free
25 stats about you. Every one sourced.
Your fitness age, your rank among 100 men your age, the one thing ageing you most, and a card to share.
- Answer 8 quick stepsAge, height, waist, pulse, activity — plus 3 tests you do on the spot with on-screen timers.
- Get a number after every answerNo waiting until the end. Each step pays out a percentile instantly.
- See your rank + fitness ageThen, if you want it, an 8-week plan with the projected change.
Questions
Straight answers
Where do the numbers come from?
Published datasets and peer-reviewed studies only: CDC NHANES body measurements (2015–2018) and resting pulse (1999–2008), NCD-RisC height for 200 countries (Lancet 2020), the FRIEND treadmill registry (Mayo Clin Proc 2022), the Norwegian HUNT Study, and the push-up, balance and sit-to-rise studies listed at the bottom of the page. Each stat shows its source.
What is “fitness age”?
An estimate. We estimate your VO2max with the NTNU HUNT non-exercise model (age, waist, resting pulse, training), calibrate it to measured US treadmill tests (the FRIEND registry), and find the age at which the median man has that VO2max. A man with an average waist, average pulse and one workout a week gets his own age. The model’s typical error is ±5.7 mL/kg/min, so treat it as a guide, not a diagnosis.
Which country am I compared with?
Height is compared with men from your own country (NCD-RisC covers 200 countries). Body size and pulse use US NHANES, the largest measured reference that publishes percentiles. Cardio fitness uses the FRIEND registry (US) and HUNT (Norway). Each stat says which population it uses.
Do you store my data?
No. Everything is calculated on your phone. Results are kept in your browser only so you can come back to them; clearing your browser deletes them.
Is this medical advice?
No. Hundred is for interest and motivation. If you have a heart condition, chest pain, or feel unwell, don’t do the tests; talk to a doctor.
Is there a version for women?
It’s coming. The test is benchmarked for men today because our audience is 94% male; the same sources publish women’s data and it’s next on the list.
Ready to find out?
90 seconds. No account. Your fitness age at the end.