CalcTray's Formula and Content Standards

About the Author

CalcTray's calculators are built and maintained by Drew Budwin, who holds a B.S. in Computer Science with a Mathematics minor from the College of Engineering at Virginia Tech. That background directly informs how CalcTray is built. Formulas come from published standards and are cross-checked against their sources before publication.

The credential covers math, computation, and formula implementation. Not medicine. Health calculators implement well-documented formulas published by medical authorities (NHLBI, CDC, WHO, AHA) and cite those sources on each page. They are not a substitute for professional medical advice.

Formula Standards

Every formula on CalcTray comes from a published, verifiable source. Financial formulas follow standard amortization and compound-interest math. Health formulas come from peer-reviewed studies or official clinical guidelines, with the specific source cited on each calculator page.

To verify the math, start with the References section at the bottom of any calculator page.

Results are for informational and educational use: planning, estimating, understanding how a formula applies to your numbers. For financial, medical, or legal decisions, a qualified professional provides context a formula cannot.

Health Content Policy

Health calculators on CalcTray implement published clinical formulas from recognized medical authorities and official guidelines. Each page cites its specific sources.

These tools are for awareness and estimation. A formula applies to your inputs; it can't account for your medical history, recent test results, or individual risk factors. No single measurement tells the full picture.

Health calculators on this site do not provide medical advice, diagnosis, or treatment. If you have health concerns, consult a qualified healthcare provider.