Bmi Calculation Formula In Python Code

BMI Formula:

\[ BMI = \frac{weight\ (kg)}{height\ (m)^2} \]

BMI Result:

Python Code:

def calculate_bmi(weight_kg, height_m):
    """Calculate BMI (Body Mass Index)"""
    bmi = weight_kg / (height_m ** 2)
    return round(bmi, 1)

# Example usage:
weight = 70  # kg
height = 1.75  # meters
bmi_result = calculate_bmi(weight, height)
print(f"BMI: {bmi_result} kg/m²")

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1. What is BMI?

Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in meters squared. It provides a simple numeric measure of a person's thickness or thinness.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

\[ BMI = \frac{weight\ (kg)}{height\ (m)^2} \]

Where:

\( weight \) — Body weight in kilograms (kg)
\( height \) — Height in meters (m)

Explanation: The formula divides a person's weight by the square of their height to categorize their weight status.

3. BMI Categories

Standard Categories:

Underweight: BMI < 18.5
Normal weight: BMI 18.5-24.9
Overweight: BMI 25-29.9
Obese: BMI ≥ 30

4. Using the Calculator

Tips: Enter weight in kilograms and height in meters. For height in centimeters, divide by 100 (e.g., 175 cm = 1.75 m). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Is BMI accurate for everyone?
A: BMI may not be accurate for athletes (high muscle mass), pregnant women, or the elderly as it doesn't distinguish between muscle and fat.

Q2: What are the limitations of BMI?
A: BMI doesn't account for muscle mass, bone density, overall body composition, or racial/sex differences.

Q3: How often should I check my BMI?
A: For most adults, checking every few months is sufficient unless you're actively trying to change your weight.

Q4: Should children use this calculator?
A: No, children and teens need age- and sex-specific BMI percentiles rather than these adult categories.

Q5: What's a healthy BMI range?
A: For most adults, 18.5 to 24.9 is considered healthy, but individual health factors should also be considered.