CheckBioAge is a free tool that lets anyone estimate their biological age using the phenotypic age formula developed by Dr. Morgan Levine and her team at Yale University and published in the peer-reviewed journal Aging in 2018.
My name is Francesco Garita. I built and maintain CheckBioAge as a personal side project.
I want to be upfront about one thing: I am not a doctor or healthcare professional. I am a Machine Learning Engineer with a long-standing personal interest in longevity science, preventive health, and how lifestyle choices interact with biological aging. I read the research, I follow the field, and I built this calculator because I wanted one for myself.
That means CheckBioAge is best understood as a faithful implementation of someone else's peer-reviewed work, not original medical research. The math is exactly the formula published by Levine et al. (2018) — you can verify it against the original paper. My job is to make that formula easy to use; the science behind it comes from the researchers cited.
⚠️ Important medical disclaimer: CheckBioAge is for educational and informational purposes only. It does not provide medical advice, diagnosis, or treatment. Phenotypic age is a research-derived estimate, not a clinical diagnostic. If your results concern you — or even if they don't — please discuss your blood work with a qualified healthcare professional who knows your full medical history.
After coming across the Levine phenotypic age formula, I wanted a simple way to estimate my own biological age from my blood test results — without signing up, without paying, and without uploading my data to anyone's server. The existing options either required an account, sold supplements alongside the results, or only worked with one specific lab's report format. So I built this.
All calculations happen in your browser. Your health data never leaves your device.
Based on peer-reviewed research published in the journal Aging (Levine et al., 2018).
No sign-up, no paywall, no hidden fees. The calculator will always be free to use.