BMI Formula:
From: | To: |
Body Mass Index (BMI) is a value derived from the mass and height of a person. The BMI is defined as the body mass divided by the square of the body height, and is expressed in units of kg/m².
The calculator uses the standard BMI formula:
Where:
Explanation: The formula calculates body mass relative to height squared, providing a standardized measure of body composition.
Details: BMI is a simple screening tool for weight categories that may lead to health problems. It helps identify potential weight problems in adults.
Tips: Enter weight in pounds, height in feet and inches. All values must be valid (weight > 0, height > 0).
Q1: What are the BMI categories?
A: Underweight (BMI < 18.5), Normal weight (18.5-24.9), Overweight (25-29.9), Obese (≥30).
Q2: Is BMI accurate for everyone?
A: BMI may overestimate body fat in athletes and underestimate it in older people with lost muscle mass.
Q3: What's a healthy BMI range?
A: For most adults, 18.5 to 24.9 is considered healthy.
Q4: Should children use this calculator?
A: No, children need age- and sex-specific BMI percentiles.
Q5: What are alternatives to BMI?
A: Waist circumference, body fat percentage, and waist-to-hip ratio provide additional information.