Life Expectancy Calculator / Biological age
Biological Age Calculator
Estimate your biological age from nine routine blood test results with the Levine PhenoAge formula.
Your result
Enter your numbers and press the button. Your result appears here.
How PhenoAge is calculated
Levine and colleagues combined nine blood tests and age into a mortality score, then turned it into the age at which the average person has that score.
xb = −19.907 − 0.0336 × albumin + 0.0095 × creatinine + 0.1953 × glucose + 0.0954 × ln(CRP) − 0.0120 × lymphocytes + 0.0268 × MCV + 0.3306 × RDW + 0.00188 × ALP + 0.0554 × WBC + 0.0804 × age
Units: albumin g/L, creatinine µmol/L, glucose mmol/L, CRP mg/dL. The calculator converts from US units for you.
Improving PhenoAge
Glucose, CRP and RDW carry the most weight. Better blood sugar control, less inflammation and good nutrition can lower PhenoAge.
PhenoAge inputs
| Test | Unit used in formula | From US units |
|---|---|---|
| Albumin | g/L | g/dL × 10 |
| Creatinine | µmol/L | mg/dL × 88.4 |
| Glucose | mmol/L | mg/dL ÷ 18 |
| CRP | ln(mg/dL) | mg/L ÷ 10 |
Common questions
Is PhenoAge the same as an epigenetic clock?
No. PhenoAge uses routine blood tests; epigenetic clocks use DNA methylation. Both were developed by Levine and colleagues.
Should I talk to a doctor?
Yes, if the result worries you or if you have new symptoms. These tools support, but do not replace, a clinical assessment.
Sources
- US Social Security Administration. Actuarial life table, 2022 period life table (2025 Trustees Report).
- Levine ME et al. An epigenetic biomarker of aging for lifespan and healthspan. Aging 2018;10:573–591; Liu Z et al. PLoS Med 2018;15:e1002718 (and correction).
- Morris JF, Temple W. Spirometric "lung age" estimation for motivating smoking cessation. Prev Med 1985;14:655–662. Quanjer PH et al. ECSC lung volumes and forced ventilatory flows. Eur Respir J 1993;6 Suppl 16:5–40.
- CDC. STEADI: Stay Independent brochure. Morse JM et al. A prospective study to identify the fall-prone patient. Soc Sci Med 1989;28:81–86.
- Bohannon RW, Andrews AW. Normal walking speed: a descriptive meta-analysis. Physiotherapy 2011;97:182–189. Studenski S et al. Gait speed and survival in older adults. JAMA 2011;305:50–58.
- Mahoney FI, Barthel DW. Functional evaluation: the Barthel Index. Md State Med J 1965;14:61–65. Shah S et al. J Clin Epidemiol 1989;42:703–709.
- Morley JE et al. A simple frailty questionnaire (FRAIL). J Nutr Health Aging 2012;16:601–608. Searle SD et al. A standard procedure for creating a frailty index. BMC Geriatr 2008;8:24.
- Kivipelto M et al. Risk score for the prediction of dementia risk in 20 years among middle aged people. Lancet Neurol 2006;5:735–741. Tombaugh TN, McIntyre NJ. J Am Geriatr Soc 1992;40:922–935.