Enter Your Details
KG
CM
YRS
⚠ Please enter valid weight and height.
—
—
—
BMI Scale
Underweight
Normal
Overweight
Obese
—
Your BMI
—
Category
—
Ideal Weight Min
—
Ideal Weight Max
Health Tip
—
📊 BMI Categories — WHO Standard
| BMI Range | Category | Health Risk |
|---|---|---|
| Below 18.5 | Underweight | Malnutrition risk |
| 18.5 – 24.9 | Normal Weight | Low risk ✓ |
| 25.0 – 29.9 | Overweight | Enhanced risk |
| 30.0 and above | Obese | High risk |
BMI Calculator – Free Body Mass Index Calculator Online
BMI Calculator is a free, beautifully designed tool that instantly calculates your Body Mass Index from your weight and height. It supports both Metric (kg/cm) and Imperial (lbs/ft/in) units, making it perfect for users in USA, UK, Pakistan, India, UAE, and worldwide. All calculations happen privately in your browser — no signup needed.
Beyond your BMI number, our calculator shows your category, ideal healthy weight range, and personalised health tips — all instantly and securely in your browser.
What is a BMI Calculator?
A BMI Calculator (Body Mass Index Calculator) measures your body weight relative to your height. It is a widely used screening tool to identify whether a person has a healthy body weight. BMI is calculated using the formula: weight (kg) ÷ height² (m²), as recommended by the World Health Organization (WHO).
How accurate is this BMI Calculator?
100% accurate. Our calculator uses the standard WHO BMI formula and supports both metric and imperial measurements with full precision. It correctly converts all units before calculating your result.
What is a healthy BMI range?
According to the World Health Organization (WHO), a BMI between 18.5 and 24.9 is considered healthy for adults. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is obese.
Does this BMI Calculator work in kg and lbs?
Yes! Our calculator supports both Metric (kilograms and centimetres) and Imperial (pounds, feet, and inches). Simply toggle between the two units at the top of the calculator.
Is my data stored or shared?
Never. All calculations happen entirely in your browser. No personal data is collected, stored, or sent to any server. Your privacy is fully protected at all times.