Biological Age Calculator
Your biological age is an estimate of how your body appears to be ageing, rather than how many birthdays you have had. Choose how much you would like to share and we will explain every part of the result.
How this estimate is produced
Your inputs are compared against published research on how sleep, exercise, smoking, alcohol, body weight and stress relate to health outcomes. Where you provide a photo, an age-estimation model contributes a second, independent signal. The two are combined into a single figure with a range around it.
The same answers always produce the same result. Nothing about the calculation is random, and no language model is involved in producing your number.
What we do with your data
Nothing is stored. There is no account, no database and no tracking of individual results. Photographs are held in memory only for as long as the analysis takes and are discarded immediately afterwards.
What this is not
This is an educational tool for general wellbeing. It is not a medical device, it does not diagnose anything, and it should not be used to make decisions about treatment. If you have a health concern, please speak to a qualified healthcare professional.