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Life and Map Tools

BMI Calculator

Calculate body mass index as a quick health reference using height and weight.

Before You Use
  • Health calculators and self-check tools are general references, not medical advice. Use official medical guidance for symptoms, diagnosis, or treatment decisions.
ToolRuns in the browser
BMI Calculator working example

Calculate body mass index as a quick health reference using height and weight.

Runs in your browser
Sample result
Example BMI Calculator result
BMI reference result
- Calculated BMI value
- Adult reference band
- WHO guidance link for interpretation limits
Next step: compare a measurement taken under similar conditions or review official WHO guidance
The interactive tool loads in this area when JavaScript is enabled.

How to use BMI Calculator

BMI (body mass index) is calculated as BMI = weight (kg) / height (m) squared. It is a general adult screening reference, not a diagnosis or direct body-fat measurement.

  • Enter adult height in cm and weight in kg.
  • Run the calculation and review the BMI value and displayed reference band.
  • Compare measurements taken under similar conditions instead of treating one value as a diagnosis.
  • Use the linked WHO guidance or a medical professional for health decisions.

Useful for

  • Check BMI category
  • Compare simple health reference values
  • Use as a non-medical reference

Common issues

The BMI value is unexpectedly extreme.

Confirm that height is entered in cm and weight in kg, then calculate again.

The BMI band does not describe body composition.

BMI is a screening reference; consider other measurements and qualified medical guidance.

How to interpret the result

Interpret BMI as a general adult screening reference, not a diagnosis or a direct body-fat measurement.

Related workflow

Next path: BMI Calculator -> BMR Calculator -> Business Days Calculator. Keep the original input nearby so you can compare each result before using it elsewhere.

Privacy and review notes

The BMI calculation runs in your browser. Do not use the result as medical advice, and avoid sharing private health information.

Basis and limitations

Basis

  • The tool applies only the entered body measurements, lifestyle records, dates, or checklist answers to its stated rules.
  • It runs the formula or self-check rules described on the page in the browser and returns a general reference result.

Limitations

  • The output is not a medical diagnosis, treatment plan, prescription, emergency assessment, or personalized health advice.
  • Symptoms, pregnancy, alcohol, sleep, weight, and mental-health decisions require official guidance or a qualified professional.

Official check

  • Before making health-related decisions, check a medical professional, public-health authority, or official medical source.

References and methodology

  • Official external source: WHO obesity and BMI guidance — Explains the adult BMI formula, classification thresholds, and age-related interpretation limits.
  • Official external source: WHO health topics — An international public-health reference for interpreting health topics and limitations.

Review scope: We automatically check that the calculation basis and official source links are shown. No licensed medical, legal, or tax professional has reviewed this result individually, so confirm with the responsible agency or a professional before an important decision.