Free tool
Lifestyle age calculator
Score four self-reportable habits - smoking, weight, activity, and alcohol - on the 0-8 scale from a 2020 JAMA Internal Medicine study of 116,043 adults, then see Sam's own age-equivalent translation of that score. This isn't a biological age test: no questionnaire replaces a blood or DNA-based one for that.
Your habits
Answer a few quick questions about your age, sex, smoking, weight, activity and alcohol habits to see your score below.
See it in Sam
Your habits, tracked over time
The four habits behind this score - smoking, weight, activity, and alcohol - show up in Sam as your own wellbeing trends, not a one-off number.
Notice wellness shifts before they slow you down.
A simple wellness score based on your recent patterns - helps you notice meaningful shifts early through trend insights and weekly wellness summaries
- Get actionable insights based on your sleep, stress, and recovery
- Monthly PDF reports with deep analysis and recommendations
- Scored against your personal baseline, not population averages.
Source
Nyberg ST, Singh-Manoux A, Pentti J, Madsen IEH, et al. Association of Healthy Lifestyle With Years Lived Without Major Chronic Diseases. JAMA Internal Medicine. 2020;180(5):760-769. doi:10.1001/jamainternmed.2020.0618
Explore Sam's other free health calculatorsFrequently asked questions
Does this measure my real biological age?+
No. A true biological age needs a blood or DNA-based test (like an epigenetic clock) - no questionnaire can replace that. This tool scores four lifestyle habits from a large, peer-reviewed study and translates the result into an age-equivalent number for comparison, nothing more.
What is this score based on?+
A 2020 study in JAMA Internal Medicine that followed 116,043 adults across 12 European cohorts. It scores four fully self-reportable habits - smoking, BMI, leisure-time activity, and alcohol intake - as 0, 1, or 2 points each (poor, intermediate, optimal), for a total out of 8.
Why does zero alcohol score lower than moderate drinking?+
That's the study's own finding, not a mistake here: it scored non-drinkers as intermediate (1 point) and moderate drinkers - within the ranges shown above - as optimal (2 points). Heavy drinking still scores worst (0 points). We reproduce this exactly as published rather than adjusting it.
Can Sam or a wearable change my biological age?+
No consumer product, including Sam, can measure or change your biological age. Sam tracks your own activity, sleep, and heart-rate trends over time, which is a different thing from an age estimate - it shows what's happening now, not a diagnosis or a guaranteed outcome.
Is this medical advice?+
No. This is a self-assessment tool for general information, not a diagnosis or medical advice. Talk to a doctor about your smoking, weight, activity, or alcohol habits, especially if any of your scores fall in the poor band.