Online BMI Calculator: Discover Your Ideal Body Mass Index
Use the free BMI (Body Mass Index) Calculator to know if you are at the ideal weight for your height. Fast, reliable and easy-to-use online tool to assess your health and well-being. Fill in the fields below and see the result instantly.
How to use the BMI calculator: Enter your weight in kilograms (kg) and your height in meters (m). The BMI result and classification appear automatically.
BMI Formula: BMI = Weight ÷ (Height × Height)
What is BMI? What is it for?
BMI (Body Mass Index) is an international parameter used to assess whether a person is within, below or above the ideal weight in relation to height. It is an important tool for health monitoring, disease prevention and nutritional guidance.
BMI calculation is simple and quick, being recommended by health professionals worldwide. However, it does not consider factors such as age, gender, fat percentage or muscle mass, serving only as an initial indicator.
- BMI below 18.5: Underweight
- BMI between 18.5 and 24.9: Normal weight
- BMI between 25 and 29.9: Overweight
- BMI between 30 and 34.9: Obesity class I
- BMI between 35 and 39.9: Obesity class II
- BMI 40 or more: Obesity class III
Important: Always consult a healthcare professional for a complete assessment. BMI is just one of the health indicators.
Frequently asked questions about BMI
- How to calculate BMI? Simply divide weight (in kg) by height squared (in meters). Example: 70 ÷ (1.75 × 1.75) = 22.86.
- What is the usefulness of BMI? BMI helps identify risks of weight-related diseases such as diabetes, hypertension and heart problems.
- Is BMI reliable for everyone? No. Children, elderly, athletes and pregnant women should seek individualized assessment, as BMI may not reflect actual body composition.
- What is the ideal weight for my height? Ideal weight varies according to BMI considered normal (18.5 to 24.9). Use the calculator to find out.
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