About VivMetric

VivMetric is an independent third-party formula calculator platform that provides reference-only mathematical computations based entirely on published public health standards. The platform aggregates 17 body metric, metabolism, hydration, sleep and routine calculators, each implementing formulas sourced directly from Centers for Disease Control and Prevention (CDC), World Health Organization (WHO), National Institutes of Health (NIH), United States Department of Agriculture (USDA), and National Sleep Foundation (NSF) publications. All arithmetic runs locally in the visitor's web browser using standard JavaScript, with no server-side processing, no account creation, and no uploaded health information of any kind. Last Updated: July 2026.

Our Positioning: Independent Formula Reference Only

VivMetric operates strictly as a formula reference utility, not as a healthcare service, medical resource, or professional consultation platform. The organization, its contributors and its automated systems hold no medical certifications, clinical licenses, dietetic registrations, or professional certifications in any health-related field. Every numerical output displayed across the site is the result of direct, unmodified application of a published standard formula to the numerical inputs provided by the visitor, without any interpretive overlay, personalized judgment, or adjustment by the platform. Where multiple published formulas exist for the same metric (for example, BMR), VivMetric presents each formula result side-by-side with explicit source attribution so that the visitor may compare the mathematical outputs directly.

This positioning is intentional and permanent. VivMetric does not aspire to become a telehealth provider, a wellness coaching platform, or a clinical tool. The scope is deliberately limited to arithmetic: taking a standard published formula, accepting numerical parameters, returning a numerical result, and alongside that result displaying the standard reference ranges cited from the same public source documents. Any statement beyond pure arithmetic is explicitly excluded from the site's permitted content scope, including any recommendation to increase, decrease or maintain any body metric, any interpretation of whether a given result is "good" or "bad" for a specific individual, and any suggestion of a specific action, product or routine.

What We Do: Formula Math, Range Reference, Data Citation

1. Pure Formula Mathematics

Each calculator page on VivMetric implements one or more standard formulas exactly as published. For example, the adult BMI calculator applies the standard WHO formula: BMI equals weight in kilograms divided by the square of height in meters (kg/m²). The BMR calculator implements both the Mifflin-St Jeor equation (published 1990, validated 2005) and the revised Harris-Benedict equation (1984 revision) as separate, independently labeled outputs. The sleep cycle calculator applies the conventional 90-minute ultradian periodicity model, calculating bedtime or wake time by counting forward or backward in 90-minute increments. In every case, the page displays the exact formula expression, defines every variable, and cites the publication from which the formula was extracted. No proprietary modifications, weighting factors, or machine-learning adjustments are applied on top of the published arithmetic.

2. Standard Range Reference Display

Where a public health authority has established standardized population reference ranges for a metric, VivMetric displays those ranges as a static, non-individualized reference table alongside the calculated result. For BMI, the ranges shown are the WHO international adult categories (Underweight below 18.5, Normal 18.5–24.9, Overweight 25.0–29.9, Obese Class I 30.0–34.9, and so on) and, separately, the CDC BMI-for-age percentile categories for pediatric populations. For sleep duration, the ranges shown are the National Sleep Foundation age-group recommendations as published. For MET values in the exercise calorie calculator, the reference table draws directly from the Compendium of Physical Activities. These ranges are shown verbatim with source labels; the site does not assign a "your result" verdict beyond locating the numerical value within the published categorical intervals.

3. Explicit Data Citation and Transparency

Every calculator page and every article page on VivMetric carries explicit, labeled citations to the specific public source document used for each formula, constant, range and reference table. Where applicable, pages include the publication identifier (e.g., a CDC Morbidity and Mortality Weekly Report number, a WHO technical report series number, an NIH PubMed identifier, or a USDA FoodData Central release version). The dedicated Data Sources page on this site lists every source URL used across the platform, with a column describing the specific data element used from each source. This citation structure allows any visitor to independently verify each formula and range by accessing the identical public document, ensuring full mathematical and referential transparency.

What We Do NOT Do: Explicit Scope Boundaries

No Medical Advice, Diagnosis, or Treatment

VivMetric provides no medical advice of any kind. No page on the site should be interpreted as stating or implying that a given calculated value indicates the presence or absence of any medical condition, disease state, or health risk. The site does not perform differential diagnosis, does not suggest or recommend any medical test, does not prescribe or recommend any medication, supplement, pharmaceutical, nutraceutical, or compound, and does not endorse any specific treatment protocol, therapy, surgical procedure, or clinical intervention. Any categorical range displayed on the site is a population reference published by a public health authority and is not a diagnosis for any specific visitor. Individuals who have any concern about any calculated metric are explicitly directed on every page to consult a qualified healthcare professional.

No Personalized Plans or Coaching

VivMetric does not create, generate, or output any personalized plan of any kind. The site does not ask for and does not store any personally identifiable information that would be required to generate a personalized plan, such as name, email address, medical history, current medications, genetic profile, pregnancy status, chronic condition status, laboratory values, or clinician referrals. The calorie budget calculator performs simple arithmetic aggregation (daily value multiplied by 7 or 30) and labels the output as a "reference budget" — not a meal plan, not a dietary prescription, and not a personalized nutrition target. The daily routine planner is a generic time-blocking tool with pre-populated interval labels that the visitor may edit freely; no routine is generated or recommended by the platform.

No Supplement, Drug, or Product Mentions

VivMetric does not mention, endorse, review, compare, recommend, link to, or advertise any dietary supplement, prescription drug, over-the-counter medication, herbal product, functional food, medical device, weight-loss product, performance-enhancing substance, cosmetic procedure, or branded consumer health product of any description. The food calorie table draws exclusively from the USDA public FoodData Central database of generic food categories; no brand names, product SKUs, or commercial identifiers appear. The site's search function is scoped exclusively to the platform's own calculators and guides; it does not return external product results. All advertising on the site is managed through the standard Google AdSense program with ad content controlled by the ad network; no advertiser has editorial input into VivMetric content.

No Training Guidance or Fitness Programming

VivMetric does not provide fitness programming, exercise instruction, or training guidance. The exercise calorie calculator implements the standard MET × weight × time formula using reference MET values from the Compendium of Physical Activities, and the output is a purely numerical calorie expenditure estimate for a labeled activity category. The site does not instruct a visitor to perform any specific exercise, does not recommend any specific number of repetitions or sets, does not suggest any training split or weekly frequency, and does not prescribe heart rate zones, intensity targets, or progressive overload schemes. The sedentary time tracker is a simple local session timer; it does not vibrate, alert, or prescribe movement breaks.

Data Source Labels and Standard References

The primary sources referenced across the VivMetric platform are, in alphabetical order: the Centers for Disease Control and Prevention (CDC, Atlanta, Georgia, U.S. Department of Health and Human Services), the World Health Organization (WHO, Geneva, Switzerland), the National Institutes of Health (NIH, Bethesda, Maryland, U.S. HHS), the United States Department of Agriculture (USDA, Washington, D.C.), and the National Sleep Foundation (NSF, Arlington, Virginia). Additional specialized references include the Institute of Medicine (IOM, now National Academy of Medicine), the European Food Safety Authority (EFSA, Parma, Italy), and the Compendium of Physical Activities maintained by the Arizona State University. Each source is attributed in-line on every calculator page where its data is used, and the full URL reference list with specific usage notes is published on the Data Sources page of this site. Visitors are encouraged to consult each source document directly for context, caveats, and full population methodology.

Frequently Asked Questions

Last Updated: July 2026