About
About VitaCalculator
VitaCalculator is a focused health calculator site built to keep the important things clear: the result, the formula, and the source. Most calculator websites are cluttered with hundreds of tools, heavy with ads, and built on dated interfaces. They hand you a number and leave you to figure out what it means.
VitaCalculator takes the opposite approach. We focus on a small set of carefully selected calculators, each based on a published formula or documented reference standard, and each explained in clear, plain language.
Our goal is not to provide medical advice. It is to help you understand health metrics through transparent calculations you can verify — with the formula, the sources, and the context all in one place. You can also read our methodology for the standards behind each result.
How we keep results trustworthy
Accuracy and transparency are the whole point of this site. Here is how we hold ourselves to that standard on every calculator we publish.
Sourced from primary references
Every calculator is built on a named, published formula or a recognized reference standard. Where relevant, we cite sources such as WHO publications, government health resources, and peer-reviewed equations such as Mifflin-St Jeor and Devine.
Transparent, verifiable math
We publish the exact formula behind every result. You can see how a number is produced and check it against the source, rather than trusting a black box.
Private by design
All calculations run locally in your browser. Your measurements are never sent to a server, logged, or stored.
Educational, not medical advice
VitaCalculator does not diagnose, treat, or make personal health recommendations. Results are screening estimates intended to be discussed with a qualified healthcare professional.
How we build each calculator
- 1
We select a formula only if it is published in a peer-reviewed paper or documented in a recognized clinical or public-health reference source.
- 2
We implement the equation exactly as published and verify the output against worked examples from the original source.
- 3
We document the formula, its assumptions, and its limitations in plain language, and link to the primary sources on the page.
- 4
We review published calculators periodically to keep formulas, thresholds, and sources current with the latest guidance.
Last reviewed: June 21, 2026