BMI Calculator

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Tool Introduction:

This BMI calculator helps you quickly calculate your BMI (Body Mass Index) based on your height and weight. It displays the BMI calculation formula and conversion process in real-time, making the calculation process clear and easy to understand. Compatible with mobile devices like phones and tablets, helping you easily understand your body weight health status.

Height unit
Weight unit
Underweight Normal Overweight Obese Severely Obese

BMI Calculation Formula

BMI =
65.0 kg
1.73 m 2
→
BMI =
65.0 kg
1.73 m 2
=
65.0
2.9929
=
21.7

About BMI

BMI (Body Mass Index) is a commonly used indicator to assess whether the ratio of weight to height is healthy. It is calculated by dividing weight (in kilograms) by the square of height (in meters). BMI values can help determine whether a person is within a healthy weight range, or whether they are at risk of being underweight, overweight, or obese.

BMI Calculation Formula

Our BMI calculator uses the following formula to calculate body mass index:

BMI = Weight(kg) / Height²(m²)

BMI Prime = BMI / 25

BMI Classification Standards

  • Underweight: BMI < 18.5
  • Normal weight: BMI 18.5-24.9
  • Overweight: BMI 25-29.9
  • Obese: BMI 30-39.9
  • Severely obese: BMI ≥ 40

Limitations of BMI

While BMI is a useful tool, it has some limitations:

  • Does not differentiate between fat and muscle mass
  • Does not consider body fat distribution
  • May not be applicable to athletes, the elderly, and pregnant women
  • Different ethnicities and races may require different BMI standards