🧮 Free BMI Calculator Online
Quickly calculate your Body Mass Index (BMI) using your height and weight. Understand your BMI category and get insights into your health.
📘 BMI Formula
BMI (Body Mass Index) is calculated using this formula:
BMI = weight (kg) / [height (m)]²
Example: A person weighing 70 kg and height 175 cm → height in meters = 1.75 m BMI = 70 / (1.75 × 1.75) = 22.86
About the BMI Calculator
The Body Mass Index (BMI) calculator helps you determine if your weight is healthy according to your height. It is a simple yet effective way to evaluate your weight category — underweight, normal, overweight, or obese — based on the World Health Organization (WHO) BMI standards.
Why Use Our Online BMI Tool?
Our free BMI Calculator is accurate, mobile-friendly, and quick. Whether you’re tracking your fitness goals, checking your health risks, or just curious about your body ratio — this tool helps you instantly.
BMI Categories (WHO Standards)
- Underweight: BMI less than 18.5
- Normal weight: BMI between 18.5 – 24.9
- Overweight: BMI between 25 – 29.9
- Obese: BMI 30 or above
Tips to Maintain a Healthy BMI
A balanced diet, regular exercise, proper hydration, and good sleep are key to maintaining an ideal BMI. Avoid crash diets and consult health professionals for personalized advice.
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FAQs – BMI Calculator
1. What is BMI?
BMI stands for Body Mass Index — a measure of body fat based on height and weight.
2. What is a normal BMI?
A normal BMI range is between 18.5 and 24.9 for adults.
3. Is BMI accurate?
BMI is a reliable indicator for general health, though athletes and children may need specialized analysis.
4. Can BMI change over time?
Yes, your BMI may change with lifestyle, diet, or exercise patterns.