BMI Calculator
Determine your Body Mass Index quickly and easily.
What does BMI mean?
The Body Mass Index (BMI) is a measure for evaluating a person's body weight in relation to their height. It was established as a standard by the WHO.
Please note: BMI does not distinguish between fat and muscle mass. For athletes with a lot of muscle mass, the value may therefore be inaccurate.
Frequently Asked Questions
When is BMI inaccurate?
BMI is inaccurate for athletes with high muscle mass, pregnant women, elderly people, and children. Muscles weigh more than fat, so muscular athletes may have an 'overweight' BMI despite being healthy.
What is a healthy BMI value?
A healthy BMI is between 18.5 and 24.9. Underweight: <18.5, Normal: 18.5-24.9, Overweight: 25-29.9, Obese: ≥30. These values apply to adults from 18 years.
How do I calculate my BMI?
BMI = Weight (kg) ÷ Height² (m²). Example: 70kg ÷ (1.75m)² = 70 ÷ 3.06 = 22.9 BMI. Our calculator does this automatically for you.
Is BMI suitable for bodybuilders?
No, BMI is unsuitable for bodybuilders. Due to high muscle mass, they often have a BMI over 25 (overweight) despite low body fat. Better: body fat measurement, WHR, or WtHR.
Does BMI differ by gender?
The BMI formula is the same for both genders, but women naturally have higher body fat percentage. Some experts recommend slightly different thresholds, but WHO categories apply to all.