dopecalc

BMI Calculator

Calculate your Body Mass Index (BMI) based on weight and height, and view your weight category according to WHO guidelines.

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About this Calculator

Calculate your Body Mass Index (BMI) based on weight and height, and view your weight category according to WHO guidelines.

Formula & Calculations

Formula

BMI = weight (kg) / height² (m²)
Where:
  • BMI=Body Mass Index
  • weight=Mass in kilograms (or converted from pounds)
  • height=Length in meters (or converted from feet and inches)

Assumptions

  • BMI is a general reference indicator and does not directly measure body fat.
  • The categorization may be less accurate for highly muscular individuals, pregnant women, and the elderly.

Calculation Examples

Example 1

Inputs:Height: 175 cm (5'9"), Weight: 70 kg (154 lbs)
Result:BMI: 22.86 (Normal weight)

Calculated as 70 / 1.75² = 22.86, placing the individual comfortably in the normal weight category (18.5 - 24.9).

Frequently Asked Questions

What is a healthy BMI range?

For adults, a healthy BMI is classified between 18.5 and 24.9. Under 18.5 is underweight, 25 to 29.9 is overweight, and 30 or higher is obese.

Is BMI an accurate measure of health?

BMI is a simple, non-invasive indicator of weight categories. However, it does not distinguish between muscle mass and fat tissue. Fit athletes may register as 'overweight' due to dense muscle mass.