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BMI Calculator — Body Mass Index

BMI is calculated as weight (kg) divided by height (m) squared. A normal BMI is 18.5–24.9 for most adults.

Body Mass Index (BMI) is a simple screening metric that uses your height and weight to estimate body fatness. While BMI does not measure body fat directly, it correlates with more accurate body-composition methods and is widely used by healthcare professionals as a quick health indicator. Our calculator supports both standard WHO categories and the revised Asian BMI thresholds, which are important for South Asian, East Asian, and Southeast Asian populations.

Your Details

Use Asian BMI categories

Applies lower thresholds for overweight/obese per WHO Asia guidelines.

How to Use This Calculator

  1. Choose metric (kg/cm) or imperial (lbs/ft-in) units.
  2. Enter your weight and height.
  3. Optionally enter your age and select your gender for additional context.
  4. Click Calculate to see your BMI score, category, and healthy weight range.

Specialised Versions

BMI Calculator for Women

bmi calculator for women · 40,000 monthly searches

BMI Calculator for Men

bmi calculator for men · 33,000 monthly searches

BMI Calculator in kg and cm

bmi calculator kg · 60,000 monthly searches

Frequently Asked Questions

Methodology & Limitations

Formulas Used

**BMI = weight (kg) ÷ height (m)²**. The formula was devised by Adolphe Quetelet in the 1830s and adopted by the WHO for population-level screening.

Limitations

BMI does not distinguish between muscle and fat mass. Athletes, pregnant women, the elderly, and highly muscular individuals may receive misleading results. BMI is a screening tool, not a diagnostic measure.

Sources & Citations

  1. World Health Organization. Obesity and Overweight Fact Sheet. 2024.
  2. WHO Expert Consultation. Appropriate body-mass index for Asian populations. Lancet. 2004;363(9403):157-163.
Last updated: 2026-02-12Reviewed by: PhysiqueLogic Editorial Team

Medical Disclaimer: This calculator provides estimates based on published formulas and is not a substitute for professional medical advice. Always consult a qualified healthcare provider before making changes to your diet or exercise routine.

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