Biological Age Calculator Comparison:
drpaulkilgore.com vs Aging.AI
An objective, side-by-side comparison to help you choose the right biological age calculator.
Why This Comparison Matters
Biological age calculators estimate how quickly your body is aging compared to your chronological age. Two of the most accessible free options are Dr. Paul Kilgore's Phenotypic Age Calculator at drpaulkilgore.com and the machine-learning-based Aging.AI platform. Both are free, but they differ significantly in algorithm, privacy, physician oversight, and what you get back from your results.
Side-by-Side Comparison
| Feature | drpaulkilgore.com | Aging.AI |
|---|---|---|
| Cost | ✓ Free | ✓ Free |
| Algorithm | Levine PhenoAge (peer-reviewed, UCLA, published 2018 in Aging) | Proprietary deep learning model trained on blood test data |
| Biomarkers Used | 9 standard blood biomarkers from CBC, CMP, and hs-CRP | 19 blood biomarkers from standard panels |
| Peer-Reviewed Formula | ✓ Published, validated, reproducible | ● ML model; not independently validated in the same way |
| Built by a Physician | ✓ Dr. Paul Kilgore, MD, MPH, FACP — board-certified internist, 36 years experience | ✗ Built by Insilico Medicine (AI/biotech research company) |
| Privacy — Data Storage | ✓ All calculations in-browser. No data transmitted or stored. | ● Data is sent to remote servers for processing |
| AI Health Recommendations | ✓ Personalized, AI-powered recommendations supervised by a board-certified physician | ✗ Returns a biological age number only |
| 10-Year Mortality Risk Score | ✓ Gompertz proportional hazard model included | ✗ Not included |
| PDF Report | ✓ Downloadable with full analysis | ✗ No report generation |
| Email Delivery | ✓ Results emailed for sharing with provider | ✗ Not available |
| Login Required | ✓ No login needed | ✓ No login needed |
| Connected Lab Ordering | ✓ Direct link to ULTA Lab Tests for ordering CBC, CMP, hs-CRP | ✗ Not available |
| Physician Consultation Available | ✓ Book a one-on-one session with Dr. Kilgore to review results | ✗ No physician access |
| Additional Tools | ✓ Part of a platform with 30+ free tools (CancerClarity, MedCheck Rx, Lipid Analyzer, etc.) | ● Standalone tool; Insilico Medicine focuses on drug discovery |
Summary
Both tools are free and accessible. drpaulkilgore.com stands out with a peer-reviewed algorithm, in-browser privacy (no data sent to servers), physician oversight, personalized AI recommendations, mortality risk scoring, and the ability to email or download results. Aging.AI uses more biomarkers (19 vs 9) and employs a machine learning approach, which may appeal to users interested in ML-based predictions. However, it returns only a number without actionable recommendations or physician context.
Try the Free Biological Age Calculator
Calculate your biological age in under 2 minutes using 9 standard blood biomarkers. Physician-built. No data stored. AI-powered recommendations included.
Calculate My Biological Age →Frequently Asked Questions
Disclaimer: This comparison is for educational and informational purposes only. Information about Aging.AI is based on publicly available descriptions as of April 2026 and may not reflect recent updates. Neither tool is a substitute for professional medical advice. Always consult your physician before making health decisions. Dr. Paul Kilgore is the creator of the Phenotypic Age Calculator at drpaulkilgore.com; this comparison is presented fairly but readers should be aware of this relationship.