Calculate Your Biological Age
A science-based self-assessment: estimate your biological age and see how fast you're aging based on lifestyle (your pace of aging). An estimate only, 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 one 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 eight evidence-based lifestyle factors in about two minutes, no signup required.
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 one 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 eight lifestyle factors: sleep, exercise, diet, smoking, alcohol, stress, body composition and social connection.
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. Two people aged 50 can have biological ages of 45 and 58.
Can you reverse your biological age?
You cannot reverse chronological age, but studies show biological aging can be slowed and partly reversed by improving modifiable factors: sleeping 7 to 9 hours, exercising several times a week, eating a whole-food diet, not smoking, moderating alcohol, managing stress and staying socially connected.
How accurate is this biological age test?
It is an educational estimate grounded in published lifestyle geroscience studies, not a medical diagnosis. For clinically validated figures, use laboratory epigenetic clocks such as Horvath, GrimAge or DunedinPACE. 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 raises your pace of aging the most, followed by obesity, physical inactivity, heavy alcohol use and chronic short sleep. Improving these has the largest effect on slowing your estimated pace of aging.