# BMI Calc Now

> An adult body mass index calculator with metric and imperial units, clear limitations and source links.

Publisher: Kymata Labs LLC, https://kymatalabs.com
Canonical origin: https://www.bmicalcnow.com

## Capabilities
- Adult BMI from height and weight in metric or imperial units.
- Text result and category range, with a copyable result.
- 20 language routes and system-aware light/dark appearance.

## Methodology and limitations
- BMI = weight in kilograms / height in metres squared.
- Imperial inputs convert using 1 inch = 2.54 cm and 1 pound = 0.45359237 kg.
- Adult categories: below 18.5; 18.5 to below 25; 25 to below 30; 30 and above.
- Adult interpretation follows CDC screening categories: https://www.cdc.gov/bmi/adult-calculator/
- Intended for adults aged 20 and over. BMI is a screening measure, not a diagnosis.
- Does not distinguish muscle from fat and is not suitable for interpreting pregnancy or pediatric growth.
- No individualized target-weight deadline or medical treatment recommendation.

## Start here
- [AI & developer access | BMI Calc Now (en)](https://www.bmicalcnow.com/en/ai/): An adult body mass index calculator with metric and imperial units, clear limitations and source links.
- [Frequently Asked Questions (en)](https://www.bmicalcnow.com/en/faq/): Frequently Asked Questions
- [How the BMI Calculator Works (en)](https://www.bmicalcnow.com/en/how-it-works/): Toggle between Metric (kilograms and centimeters) and Imperial (pounds, feet, and inches). The calculator automatically adjusts all labels, input fields, and placeholder values to match your selection. The toggle is clearly visible at the top of the calculator card.
- [Free BMI Calculator — Body Mass Index | BMI Calc Now (en)](https://www.bmicalcnow.com/en/): A simple adult screening tool. A clearer explanation. BMI is one screening measure, not a diagnosis or a weight goal. It does not distinguish muscle from fat and is not suitable for pregnancy.
- [Acceso para IA y desarrolladores | BMI Calc Now (es)](https://www.bmicalcnow.com/es/ai/): Calculadora del índice de masa corporal para adultos con unidades métricas e imperiales, límites claros y fuentes.
- [Preguntas Frecuentes (es)](https://www.bmicalcnow.com/es/faq/): Preguntas Frecuentes
- [Cómo Funciona la Calculadora de IMC (es)](https://www.bmicalcnow.com/es/how-it-works/): Alterna entre Métrico (kilogramos y centímetros) e Imperial (libras, pies y pulgadas). La calculadora ajusta automáticamente todas las etiquetas, campos de entrada y valores de referencia según tu selección. El interruptor está claramente visible en la parte superior de la tarjeta de la calculadora.
- [Calculadora de IMC Gratis — Índice de Masa Corporal | BMI Calc Now (es)](https://www.bmicalcnow.com/es/): Una herramienta sencilla para adultos. Una explicación más clara. El IMC es una medida de cribado, no un diagnóstico ni un objetivo de peso. No distingue músculo de grasa y no es adecuado durante el embarazo.

## Resources
- [/robots.txt](https://www.bmicalcnow.com/robots.txt): RFC 9309. Crawl policy for public pages and rendering assets.
- [/sitemap.xml](https://www.bmicalcnow.com/sitemap.xml): XML Sitemap + hreflang. Canonical pages and reciprocal language equivalents derived from existing routes.
- [/llms.txt](https://www.bmicalcnow.com/llms.txt): Markdown directory. Concise identity, methods, canonical starting points and citation guidance.
- [/llms-full.txt](https://www.bmicalcnow.com/llms-full.txt): Markdown directory. Complete generated page directory, grouped by language, with summaries.
- [/llms-full/index.txt](https://www.bmicalcnow.com/llms-full/index.txt): Markdown directory. Smaller language-specific directories for bounded retrieval.
- [/site-directory.json](https://www.bmicalcnow.com/site-directory.json): Custom JSON directory 1.0. The route inventory used to generate this page and discovery files.
- [/feed.json](https://www.bmicalcnow.com/feed.json): JSON Feed 1.1. Guide summaries linking to their canonical pages; known dates only.
- [/schema-feed.json](https://www.bmicalcnow.com/schema-feed.json): schema.org DataFeed / JSON-LD. Page descriptions, language and canonical identity.
- [/manifest.webmanifest](https://www.bmicalcnow.com/manifest.webmanifest): Web App Manifest. Application identity, theme and icons.
- [/.well-known/ai.json](https://www.bmicalcnow.com/.well-known/ai.json): Custom site directory 1.0. Verified capabilities and discovery resources. This is not a standardized agent protocol.
- [/openapi.yaml](https://www.bmicalcnow.com/openapi.yaml): OpenAPI 3.0.3. Read-only discovery resource contract. It does not expose browser calculations as an API.
- [/.well-known/security.txt](https://www.bmicalcnow.com/.well-known/security.txt): RFC 9116. Security reporting contact and expiry.

## Privacy and citation
Calculations run in the browser. Optional usage analytics excludes calculator inputs and requires a choice. Site analytics and advertising are separate from the calculation. Cite a specific canonical page and distinguish mathematical examples from predictions or personal advice.
These optional directories do not guarantee crawling, indexing, ranking or AI citation. No server-side calculator API, MCP server or A2A agent is advertised.

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- [BMI Calc Now](https://www.bmicalcnow.com/en/): Adult BMI screening calculator
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- [Kymata Health](https://kymatahealth.com/): Health publication and calculators