A free calculator that estimates your biological age from standard blood biomarkers, using the peer-reviewed formula by Levine et al. (2018).
⚠️ Important: CheckBioAge is an educational tool, not a medical device. Results are an estimate produced by a research formula and do not constitute a diagnosis or medical advice. The calculator is built by a non-medical author (see About) as a faithful implementation of the Levine et al. (2018) study. Always discuss your blood results with a qualified healthcare professional who knows your medical history.
Enter your biomarkers and dates below. Choose the units from your lab report. This calculator runs in your browser (no login, no storage).
In the original Levine et al. (2018) study, individuals with a phenotypic age lower than their chronological age had reduced all-cause mortality risk in follow-up, while those with a phenotypic age higher than their chronological age had elevated risk. Phenotypic age is associated with — but does not cause — these outcomes, and many factors that influence it are modifiable through lifestyle. Read the paper.
Phenotypic age is an estimate, not a diagnosis. A single result is a snapshot — changes in any of the input biomarkers (illness, hydration, recent exercise, time of day) can shift the number. Trends across repeat tests are more informative than any one measurement. Consider discussing notable results with your doctor.
Your biomarkers are favourable relative to your chronological age. Lifestyle factors are likely contributing.
Biomarkers are somewhat favourable compared to peers of the same chronological age.
In line with what's expected for your chronological age. Routine variation falls in this range.
One or more biomarkers are higher than typical for your age group. Consider discussing them with your doctor.
This warrants a conversation with a healthcare professional — they can interpret your individual biomarkers in the context of your medical history.
Phenotypic age is one way of measuring your biological age - it tells you how well your body is aging compared to your chronological age. Unlike your calendar age, it reflects your actual cellular health and predicts mortality risk, disease risk, and physical function better than age alone. Learn more
This calculator uses the scientifically validated Levine formula published in the journal Aging (2018), based on analysis of 9,926 adults. It's the same formula used in longevity research and has been shown to be a strong predictor of healthspan and lifespan.
You need 9 biomarkers: Albumin, Creatinine, Glucose, CRP, Alkaline Phosphatase, WBC, Lymphocyte %, MCV, and RDW-CV. Most come from a standard Full Blood Count plus a basic metabolic panel. See full requirements
Yes! Phenotypic age is not fixed. Studies show improvements through lifestyle changes including nutrition, exercise, sleep, and stress management. Many people see improvements within 6-12 months. Get evidence-based tips
No. All calculations happen in your browser using JavaScript. Your data never leaves your device, is not stored on any server, and is not shared with anyone. We respect your privacy.
Most experts recommend retesting every 6-12 months to track progress. This gives your body enough time to respond to lifestyle changes while allowing you to catch any concerning trends early.