VitalMetrics is a free collection of health calculators built on peer-reviewed, clinically validated formulas — designed to give clear, useful answers without requiring a medical degree to interpret them.
Most health calculator websites fall into one of two camps: tools buried in cluttered medical portals that require account creation and wade through jargon, or slick consumer apps that give you a number with no explanation of where it came from or how much to trust it.
VitalMetrics exists to fill the gap. We believe that understanding your own health numbers is genuinely useful — but only if you also understand what those numbers mean, how they are calculated, what they cannot tell you, and when you should seek professional advice instead of relying on an algorithm. Every calculator is accompanied by a thorough explanation of the methodology, its limitations, and guidance on applying the results sensibly.
We only use formulas published in peer-reviewed research and validated against measured outcomes. Where multiple formulas exist for the same metric — as with ideal weight — we present all of them so you can see the range of estimates rather than a false single point of certainty. We are transparent about every method's limitations. No calculator can replace clinical assessment, and we say so clearly on every page.