Biological Age Calculator
Your birthday tells you how many years have passed. It does not tell you how well your body is holding up. Estimate your biological age from a selfie, a short lifestyle questionnaire, or both.
Free to use. No account needed. Photographs are never stored.
What is biological age?
Chronological age is simply the number of years since you were born. It moves at the same rate for everyone and nothing you do will change it.
Biological age is a different idea. It is an estimate of how old your body appears to be, based on signals associated with health and ageing. Two people born on the same day can look and function very differently at fifty, because sleep, movement, stress, smoking, alcohol and a great deal of luck all leave traces.
This calculator gives you a readable estimate of that idea. It is a wellness estimate rather than a clinical measurement, and it is designed to be honest about the difference.
How it works
- Step 1
Tell us your age
Your chronological age is the baseline every estimate is measured against. It is the only required input.
- Step 2
Choose what to share
A selfie, a short questionnaire, or both. You decide how much to provide, and you can stop at any point.
- Step 3
See your estimate
You receive an estimated biological age with a range, the factors that shaped it, and practical suggestions.
Three ways to estimate
Most calculators make you complete a long form before showing you anything. This one lets you decide how much to share. Every path produces a result.
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Quick Estimate
About 30 seconds
Enter your age and upload a selfie.
The fastest way to see a result. Facial analysis estimates how old you appear, which is combined with the age you entered.
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Lifestyle Estimate
About 2 minutes
Enter your age and answer a short questionnaire.
No photograph required. Questions cover sleep, exercise, smoking, alcohol, stress and body measurements.
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Complete Estimate
Most comprehensiveAbout 2 to 3 minutes
Combine a selfie with the questionnaire.
Uses every input the calculator supports, so the estimate reflects the most complete picture available.
Why biological age matters
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A number you can act on
Your date of birth cannot change. The habits behind an ageing estimate can, which makes it a more useful thing to think about.
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Attention on the right habits
Sleep, physical activity, smoking, alcohol and stress are consistently associated with long-term health. Seeing them together is a useful prompt.
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A starting point, not a verdict
The result is designed to encourage rather than to alarm. It shows what you already do well before it suggests anything to change.
Common questions
- What is biological age?
- Chronological age counts the years since you were born. Biological age is an estimate of how old your body appears to be, based on signals associated with health and ageing. Two people born on the same day can differ, because lifestyle and environment shape how the body ages.
- How is the estimate produced?
- You always provide your chronological age. You may then add a selfie, a short lifestyle questionnaire covering sleep, exercise, smoking, alcohol, stress and body measurements, or both. Those inputs are combined by a deterministic scoring engine, so identical inputs always produce an identical result. No language model decides your number.
- Is my photo stored?
- No. A photograph is processed only to produce your estimate and is discarded immediately afterwards. There is no database, no account and no history of your results. The Privacy Policy explains this in full.
- How accurate is the estimate?
- Treat it as a wellness estimate rather than a measurement. No clinical test exists that this calculator reproduces, and no validated model takes a selfie and a lifestyle questionnaire as its input. Every result is shown with a range and a label describing how much information you provided, because we would rather be honest than imply precision that does not exist.
Curious about your biological age?
It takes about thirty seconds to find out, and you never have to upload a photograph if you would rather not.
Start your estimate