Disclaimer
This Disclaimer governs the use of all calculators, reference tables, formula explanations, and articles published on the VivMetric website. The platform provides only neutral, formula-based mathematical computations and unmodified public reference ranges sourced from designated public health authorities. Visitors should read and understand the following limitations, scope boundaries, and warranty disclaimers before using any calculator or relying on any reference data presented on this site. Your Money or Your Life (YMYL) content protections are in effect for every page: VivMetric does not provide medical, nutritional, or health guidance of any kind. Last Updated: July 2026.
All calculations and data on this website are for informational reference only. This tool does not provide medical advice, diagnosis, or treatment. For health-related concerns, please consult a qualified healthcare professional.
No Medical Advice
No content on VivMetric constitutes medical advice, professional healthcare guidance, or a medical opinion. The site does not and cannot provide a diagnosis of any disease, disorder, condition, syndrome, impairment, or risk state in any individual visitor. No calculator result, reference range match, categorical label, or article statement should be construed as indicating the presence or absence of a medical problem. The site does not recommend or suggest any specific medication, dosage, supplement, nutrient, dietary regimen, exercise program, surgical procedure, therapy, diagnostic test, screening, or treatment protocol. Individuals who are experiencing symptoms, who have a known or suspected medical condition, who are pregnant or planning pregnancy, who are taking medications, or who have any health concern whatsoever must consult a licensed physician, nurse practitioner, physician associate, registered dietitian nutritionist, or other appropriately qualified healthcare professional before making any health-related decision.
VivMetric content falls within the "Your Money or Your Life" (YMYL) category as defined by major search engine quality guidelines, because health calculations have the potential to impact visitor welfare. To maintain strict YMYL compliance, VivMetric operates under the following safeguards: no page asserts medical expertise; all pages explicitly disclaim medical advice; all formulas are attributed to named public health authorities; no page provides treatment or intervention guidance; and every page includes the fixed standard disclaimer directing visitors to a qualified healthcare professional. These measures are applied uniformly across all 17 calculators, 10 guide articles, and 4 legal pages, and are present regardless of whether the individual page is a calculator page or a static informational page.
Formula Limitations
Every formula implemented on VivMetric is a population-level mathematical model, and all such models carry inherent limitations. Population-level formulas such as BMI, Mifflin-St Jeor BMR, BMI-based body fat estimation, and MET-based calorie expenditure are validated across large groups but cannot capture the full variability of individual biology. Factors including but not limited to individual genetic variation, hormonal status, medical history, pharmaceutical interference, renal function, hepatic function, body composition distribution, bone mineral density, menstrual status, altitude, climate, and recent caloric or exercise history are not inputs to the formulas and therefore cannot be reflected in any output. Where a public authority publishes explicit caveats alongside a formula (for example, the WHO's explicit note that BMI is not a diagnostic tool and should be used only as a population screening indicator), those caveats are reproduced on the relevant calculator pages.
Rounding, unit conversion, and input truncation behavior may vary between VivMetric's implementation and the implementation used by the original source publication. For example, a pound-to-kilogram conversion rounded to two decimal places on this site may differ by a fraction of a unit from the same conversion rounded to four decimal places in a clinical setting. Input values beyond the validated range of a formula (for example, an adult BMI calculation applied to an age or weight outside the range used in the formula's original validation cohort) will still produce a numerical output but that output has no published validation and should be treated as pure arithmetic only, with no reference-range applicability. All formula outputs are explicitly labeled on each calculator page with the formula name and source publication so that the visitor may consult the source document for the original scope and limitations description.
Public Data Reference Only
All reference ranges, categorical tables, growth chart percentiles, MET values, food calorie data, and sleep duration recommendations displayed on VivMetric are reproduced from public, freely accessible publications issued by the Centers for Disease Control and Prevention (CDC), World Health Organization (WHO), National Institutes of Health (NIH), United States Department of Agriculture (USDA), National Sleep Foundation (NSF), Institute of Medicine (IOM), European Food Safety Authority (EFSA), and the Compendium of Physical Activities. The data is presented verbatim where feasible, with source labels indicating the originating agency. VivMetric does not curate, modify, re-weight, supplement, reorder, or subjectively interpret the public reference data. Where a public source document contains multiple competing reference ranges for the same metric, each range is displayed separately alongside its originating label.
Public source documents may be updated, revised, retracted, or superseded by the issuing authority without notice to VivMetric. While VivMetric endeavors to review source publications on a periodic basis and update page content accordingly, there may be a lag between a public source update and the corresponding update on this site. Visitors should always cross-check critical or time-sensitive reference data directly against the live publication on the issuing authority's official website, using the URLs provided on the Data Sources page of this site. The Data Sources page includes release and version identifiers where available (e.g., USDA FoodData Central release number, Compendium of Physical Activities edition year) to facilitate direct version comparison.
No Warranty
The VivMetric website and all of its calculators, tables, and articles are provided on an "AS IS" and "AS AVAILABLE" basis, without warranties of any kind, whether express, implied, statutory, or at common law. To the maximum extent permitted by applicable law, VivMetric disclaims all warranties, including but not limited to warranties of merchantability, fitness for a particular purpose, accuracy, completeness, reliability, non-infringement, absence of latent or patent defects, title, quiet enjoyment, and compatibility with any particular device, browser, or operating system. No oral or written statement by any contributor, agent, or representative of VivMetric shall create a warranty.
Without limiting the foregoing, VivMetric does not warrant that any calculator will be uninterrupted, error-free, virus-free, secure, or available at any particular time; that any reference data will be current, complete, or accurate; that any formula output will match the output produced by any other implementation of the same formula; or that any defects will be corrected. To the maximum extent permitted by applicable law, in no event shall VivMetric, its operators, its contributors, its hosting providers, its domain registrars, its advertising network partners, or any associated entity be liable for any direct, indirect, incidental, consequential, special, exemplary, punitive, or any other damages of any kind arising out of or related to access to, use of, reliance upon, or inability to use any content on the VivMetric website, even if advised of the possibility of such damages.
External Links
The VivMetric website contains hyperlinks to external websites operated by third parties, including but not limited to the official web sites of public data sources (CDC, WHO, NIH, USDA, NSF, IOM, EFSA) and partner calculator sites. These external links are provided solely as a convenience to visitors who wish to verify source material or explore related tools. VivMetric does not control, does not vet, and does not endorse the content, products, services, privacy policies, security practices, terms of service, or any other aspect of any third-party website linked from this site. The inclusion of any external link on VivMetric does not constitute an endorsement, approval, verification, guarantee, or recommendation by VivMetric of the linked website or of any content, product, or service referenced on that website.
Visitors follow external links entirely at their own risk. VivMetric shall have no liability for any loss, damage, infection, or inconvenience arising from visiting any linked external website, including any harm resulting from viruses, malware, phishing, fraudulent content, or inaccurate information present on external sites. Visitors should independently review the privacy policy and terms of service of every external website they visit, as VivMetric's privacy policy and disclaimer apply solely to content served from the vivmetric.com domain and its subdomains.
Contact
For communications relating to this Disclaimer, including but not limited to reports of arithmetic errors, formula discrepancies, source document updates, broken external links, or corrections to reference data, please use the contact channel specified on the Privacy Policy page of this site. Communications of this nature are reviewed against the original public source documents; if a verifiable discrepancy is confirmed, the relevant page is corrected and the Last Updated date is incremented. Please note that VivMetric is unable to respond to questions about individual health, personal calculation interpretation, or requests for advice, and such requests will receive a standardized reply directing the sender to consult a qualified healthcare professional. Communications received through any channel are logged for operational and legal purposes and are covered by the Privacy Policy on this site.
Frequently Asked Questions
Because all VivMetric outputs are mathematical references only and are subject to formula limitations, VivMetric applies the fixed standard disclaimer plus a link to this full Disclaimer page on every calculator output and at the footer of every page. This ensures that every visitor, regardless of landing page, is informed of the no-medical-advice, formula-only scope before relying on any numerical output. It is also a core component of the platform's YMYL compliance framework.
No. VivMetric expressly disclaims any and all clinical, diagnostic, or therapeutic use. The formulas are population-level public reference implementations, not validated medical devices, and they are not registered as such with any regulatory body. Licensed clinicians who require formulas for clinical work should obtain validated tools through clinical-grade vendors, the original source documents, or their institution's approved software suite, not through VivMetric.
Where two or more public authorities publish a different reference range or formula for the same metric, VivMetric displays each version separately with explicit source labels. No attempt is made to "reconcile" or pick a "winner" between competing public sources. For example, both WHO adult BMI categories and the slightly variant CDC adult BMI annotations are shown on the BMI calculator page, each labeled with its originating agency. Visitors may choose which reference framework to use for their own informational purposes.
Visitors who believe a formula, number, reference range, citation, or text element is incorrect should submit a detailed report via the contact channel on the Privacy Policy page, including the page URL, the specific element in question, and a link to the authoritative public source document that contradicts the site content. Reports are cross-referenced against the cited source and, if verified, corrected promptly with the Last Updated date incremented. No correction is made solely on the basis of opinion or anecdote.
Last Updated: July 2026