BMI Calculator & Ideal Weight Check

BMI (Body Mass Index) is a body fat index calculated from weight and height. It is an international indicator established by the WHO, widely used to assess obesity and underweight in adults.

Usage is very simple. Enter your height in centimeters (cm) and weight in kilograms (kg), then press the "Calculate" button. Your BMI value, obesity level, and ideal weight for your height are displayed instantly.

BMI Formula

BMI = Weight (kg) / Height (m) squared

For example, for a height of 170cm and weight of 65kg: BMI = 65 / (1.70 x 1.70) = 22.5.

WHO BMI Classification

• BMI below 18.5: Underweight
• BMI 18.5 to 24.9: Normal weight
• BMI 25.0 to 29.9: Overweight
• BMI 30.0 to 34.9: Obese (Class I)
• BMI 35.0 to 39.9: Obese (Class II)
• BMI 40.0 and above: Obese (Class III)

Statistically, a BMI of 22 is associated with the lowest risk of lifestyle-related diseases. The ideal weight is calculated as: Ideal Weight = Height (m) squared x 22.

Q. Is BMI accurate for people with high muscle mass?

A. BMI is calculated from height and weight only, so for athletes or people with low body fat percentage, results may differ from actual body fat levels. BMI should be used as a screening indicator, and accurate body composition should be checked separately with a body fat analyzer.

Q. Can BMI be used for children?

A. BMI is an indicator designed for adults (18 years and older). For children, other age-appropriate body metrics are used. This tool displays calculation results for adults.

Q. What is the relationship between ideal weight and BMI 22?

A. Based on statistical data showing that the risk of lifestyle-related diseases is lowest at BMI 22, this value is used as the standard for ideal weight. However, individual differences exist, so BMI 22 is only a guideline. Please consider your overall health condition and medical check-up results.