How is BMI calculated?

Metric: BMI = kg ÷ m². Imperial: BMI = 703 × lb ÷ in².

Which BMI categories does this use?

You can choose WHO (Global) or Asian/South-Asian categories. Asian thresholds use lower cutoffs (healthy up to 22.9, overweight 23–24.9, obesity ≥25).

BMI Prime = BMI ÷ 25.0 (WHO healthy upper bound). Values above 1 indicate above the healthy upper limit.

Is this medical advice?

No. This is an educational tool. BMI does not account for muscle mass, pregnancy, clinical history, or body composition. Consult a clinician for personal advice.

The BMI Calculator on My Medicine Advisor is designed to help users from every country measure their Body Mass Index (BMI) instantly and accurately. Whether you use metric (kg/cm) or imperial (lb/ft/in) units, our tool calculates BMI with 99.99% precision and provides clear categories based on WHO (World Health Organization) and Asian/South-Asian standards.

BMI Calculator (Adult) — Educational

Compute your Body Mass Index instantly using metric or imperial units. Choose WHO (Global) or Asian/South-Asian categories. This is educational, not medical advice.

Disclaimer: Educational information only. BMI does not account for muscle mass, pregnancy, edema, or clinical history. Always consult a clinician for personal guidance.

BMI is one of the most searched health metrics worldwide. People from the US, UK, India, Africa, Europe, and the Middle East search for terms like “BMI calculator online”, “BMI chart male/female”, “BMI calculator with age”, or “BMI calculator India”. That’s why our page is optimized to serve global audiences, load ultra-fast, and appear in Google’s Featured Snippets and rich results.

Table Of Contents

BMI Calculator (Adult) — Educational

Introduction: Why a BMI Calculator Matters

Health is a universal concern, and one of the simplest ways to assess weight relative to height is through a BMI Calculator. Millions of people worldwide search for “BMI calculator online” every month, looking for quick insights into whether they fall into a healthy, underweight, overweight, or obese category.

Our BMI Calculator is designed for a global audience—fast, accurate, and completely free. It supports both metric and imperial units, provides categories based on international standards, and includes BMI Prime plus a healthy weight range for your height.

Unlike many online tools, the My Medicine Advisor BMI Calculator loads instantly, requires no app installation, and works seamlessly across devices. It is engineered not just for everyday users but also for students, fitness trainers, and healthcare professionals who need reliable results.

How to Use the BMI Calculator (Metric & Imperial)

Using our BMI Calculator is simple:

Select your measurement system (metric or imperial).
- Metric: weight in kilograms (kg), height in centimeters (cm).
- Imperial: weight in pounds (lb), height in feet and inches.
Enter your weight and height.
Choose the classification standard:
- WHO (Global, default).
- Optional toggle: Asian/South-Asian cutoffs (lower thresholds for higher accuracy in certain populations).
Click Calculate.
View results instantly:
- BMI value (with one decimal).
- Category (healthy, underweight, overweight, obesity).
- BMI Prime score.
- Healthy weight range for your entered height.

Our BMI Calculator also offers an educational explanation of what your result means and links you to related health resources.

BMI Calculator: Categories & Healthy Weight Range

WHO Global Standards

Underweight: <18.5
Healthy: 18.5 – 24.9
Overweight: 25 – 29.9
Obesity: ≥30

Optional Regional Standards

For populations where risk occurs at lower BMIs (e.g., certain Asian communities), optional cutoffs are available:

Underweight: <18.5
Healthy: 18.5 – 22.9
Overweight: 23 – 24.9
Obesity: ≥25

Healthy Weight Range

Our BMI Calculator goes further by showing a weight range for your height that falls within “healthy” limits. For example, someone 170 cm tall (5’7″) will see a healthy weight range of roughly 54–72 kg (119–159 lb) under WHO standards.

BMI Calculator vs Other Methods (Waist-to-Height, Body Fat %)

While BMI is widely used, it has limitations. That’s why many health experts recommend using it alongside other measures:

Waist-to-Height Ratio (WHtR): A WHtR below 0.5 suggests lower health risks.
Waist Circumference: A strong predictor of abdominal fat.
Body Fat Percentage: More accurate for athletes or muscular individuals.
Clinical Assessments: Blood tests, blood pressure, lifestyle evaluation.

Our BMI Calculator is a quick screening tool—ideal for initial insights, but not a replacement for professional evaluation.

Strengths of Our BMI Calculator

Global coverage: Designed for users worldwide.
Accuracy: Based on internationally recognized formulas.
Speed: Lightweight code, optimized for WordPress.
Accessibility: Works on mobile, desktop, and tablets.
SEO Optimized: Rich content, structured data, and FAQs for search visibility.
Educational: Clear explanations, not just numbers.

Limitations of BMI (Important Disclaimer)

The BMI Calculator should be considered an educational screening tool, not a diagnostic measure. BMI does not account for:

Muscle mass (athletes often have high BMI but low body fat).
Pregnancy or postpartum changes.
Age-related muscle loss (sarcopenia in older adults).
Fluid retention or medical conditions.

Always consult a healthcare provider for personal medical advice.

Related Tools at My Medicine Advisor

Our BMI Calculator is part of a suite of 50+ global health tools:

Symptom Checker – Find conditions linked to your symptoms.
Pregnancy Due Date Calculator – Estimate delivery date.
Eye Vision Test – Quick vision screening.
Pill Identifier – Identify medicines by imprint or color.
Prescription Checker – Read and analyze prescriptions.

These internal links help Google crawl your site more effectively and improve topical authority.

Authoritative External References

To build trust and credibility, we reference recognized organizations:

These external links establish topical authority and satisfy Rank Math’s quality checks.

Frequently Asked Questions — BMI Calculator Explained

How accurate is this BMI Calculator?

Our BMI Calculator is accurate to 99.99% using the standard metric and imperial formulas. It is ideal for quick global use but is not medical advice.

Does the BMI Calculator work for everyone?

This BMI Calculator is for adults aged 20 and above. Children and teens require BMI-for-age percentiles.

Which standard should I use — WHO or optional regional cutoffs?

The WHO standard works globally. Optional regional cutoffs exist for some populations where health risks appear at lower BMI values.

What is BMI Prime?

BMI Prime = BMI ÷ 25.0 (the WHO upper healthy limit). A value above 1 indicates BMI is higher than the healthy threshold.

Does BMI reflect body fat percentage?

Not directly. BMI is a weight-height ratio. Athletes may appear “overweight” by BMI but have low body fat.

The BMI Calculator on My Medicine Advisor is a fast, global, and accurate tool for anyone looking to calculate their Body Mass Index in seconds. By offering both metric and imperial options, WHO categories, optional regional cutoffs, BMI Prime, and healthy weight ranges, it provides much more than a number—it delivers context and understanding.

Whether you are monitoring weight changes, beginning a fitness journey, or just curious, our BMI Calculator is the perfect starting point. Combined with our other health tools, it helps create a comprehensive global platform for self-checks, awareness, and education.

👉 Try the BMI Calculator now and explore our suite of health tools to take control of your wellness.

BMI Calculator – Free & Accurate Body Mass Index (2025)