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Home›⚖️ Health›BMI Calculator — Body Mass Index
🧮 Calculator📖 Guide

BMI Calculator — Body Mass Index

Enter weight and height to calculate BMI

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BMI Calculator — Body Mass Index

Calculate your Body Mass Index (BMI) and what it means for your health. Based on WHO standards.

Planning estimateThe result is a planning estimate only. It does not replace professional advice or a personal review.

What is BMI and How Is It Calculated?

BMI (Body Mass Index) is a statistical measure using height and weight to classify body weight. Developed by the WHO as a population screening tool, not an individual medical diagnosis.

BMI Formula

BMI = weight(kg) ÷ height²(m) · Example: 70kg ÷ (1.75)² = 22.9 — Normal weight.

WHO Classification

  • Below 18.5: Underweight
  • 18.5–24.9: Normal weight ✅
  • 25–29.9: Overweight
  • 30+: Obese

💡 Useful Tips

  • BMI does not distinguish between muscle and fat — athletes may be incorrectly classified as overweight.
  • Children and teens have separate BMI charts by age and sex.
  • Use BMI as a starting point only — not as a substitute for medical advice.

Frequently Asked Questions

What is a healthy BMI for women?

The healthy BMI range (18.5–24.9) applies to both men and women. However, women naturally carry more body fat, so body fat percentage is also worth tracking.

Is a high BMI always bad?

Not necessarily. Athletes with high muscle mass can have a BMI of 27-28 and excellent health. BMI is a screening tool, not a diagnosis.

Methodology, Sources & Accuracy

Formulas run locally in your browser from the values you enter. Results are estimates and may vary with local rules and personal circumstances.

  • How it is calculated: What is BMI and How Is It Calculated?
  • Privacy: Inputs remain on your device and are not sent to a server.
  • Last updated: July 1, 2026

Report an issue or inaccurate result · Related guides and references

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