Pace of Aging Test
How fast are you aging? Answer a few short questions in 5 steps, covering 8 lifestyle factors, and we estimate your pace of aging in about 2 minutes. It is an estimate built from your answers and population research, not a measurement and not a medical diagnosis.
How fast are you aging? Understanding your pace of aging
Pace of aging is how fast your body ages relative to calendar time. A pace of 1.0 means you age 1 biological year per chronological year; below 1.0 means you are aging slower than average, and above 1.0 faster. This free test estimates your pace of aging from 8 evidence-based lifestyle factors in about 2 minutes, no signup required. It reports a pace, not a biological age in years: a questionnaire cannot put a year value on your biology.
Want the visual counterpart? How old do I look? estimates your face age from your camera in about 60 seconds.
Biological age vs chronological age vs pace of aging
| Measure | What it answers | Example |
|---|---|---|
| Chronological age | How many years you have lived | 41 years |
| Biological age | How old your body seems to be | 39 years |
| Pace of aging | How fast you are aging right now | 0.94 (6% slower) |
Frequently asked questions
How fast am I aging?
Your pace of aging compares how quickly your body ages against 1 year per calendar year. A pace of 1.0 is average; below 1.0 means slower biological aging, and above 1.0 faster. This free test estimates your pace from 8 lifestyle factors: sleep, exercise, diet, smoking, alcohol, stress, body composition and social connection.
Can you calculate, measure or determine your biological age?
You can estimate it here, as a pace rather than a number of years: in about 2 minutes, this questionnaire turns 8 lifestyle answers into a weighted score on the pace-of-aging scale. It shows which way your habits point; it does not measure your biology. A measured value needs a lab, usually a DNA-methylation clock such as DunedinPACE, PhenoAge or GrimAge, run on a blood sample.
What is pace of aging, and what is DunedinPACE?
Pace of aging is the speed at which your body deteriorates over time, expressed as biological years per calendar year. DunedinPACE is a blood-based epigenetic measure developed from the Dunedin Study (Belsky et al., 2022) that quantifies this rate from DNA methylation. This test uses the same pace-of-aging concept but estimates it from lifestyle inputs rather than a blood sample.
How is biological age different from chronological age?
Chronological age is simply how many years you have been alive. Biological age reflects how old your body actually seems based on your health and lifestyle, and can be higher or lower than your chronological age. 2 people aged 50 can have biological ages of 45 and 58.
Can you reverse your biological age?
You cannot reverse chronological age. In population studies, people who sleep 7 to 9 hours, exercise several times a week, eat a whole-food diet, do not smoke, drink little and stay socially connected show slower biological aging. One randomized trial (calorie restriction, CALERIE) slowed a measured pace of aging by a few percent, and small pilot trials report epigenetic-clock drops within months; whether that is lasting reversal is not established.
How accurate is this biological age test?
It is an educational estimate grounded in published lifestyle geroscience studies, not a medical diagnosis. We set its weights from that research, and how closely its score tracks a measured pace of aging has not been tested. Laboratory epigenetic clocks such as Horvath, GrimAge or DunedinPACE measure more directly, but they are research-grade laboratory measures, not clinically validated for individual use. This test is best used to see which habits most affect your aging and to track changes over time.
Which factors speed up aging the most?
In this model, current smoking adds the most (+3.5), followed by quitting less than a year ago (+2.0) and obesity (+1.8 to +2.0), heavy drinking (+1.6), no exercise at all (+1.5) and a poor diet (+1.0). Sleeping more than 10 hours and being very isolated add +0.8 each, underweight +0.5 to +0.8, under 6 hours of sleep +0.7 and high stress +0.5. These are the model's weights, chosen from population studies, not effects measured in you.
Keep reading
- Biological age test: does insurance pay?What a biological age test costs in Germany and who covers it.
- Epigenetic age tests comparedHow DNA-methylation clocks measure biological age, with cost and accuracy.
- How to slow aging, rankedThe levers with the strongest evidence, ordered by effect.
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