Bmi Calculator With Weight In Kg And Height In Feet

BMI Formula:

\[ BMI = \frac{weight\ (kg)}{(height\ (ft) \times 0.3048)^2} \]

Body Mass Index (BMI):

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1. What is BMI?

Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, normal weight, overweight and obesity in adults. It is calculated by dividing a person's weight in kilograms by the square of their height in meters.

2. How Does the Calculator Work?

The calculator uses the BMI formula:

\[ BMI = \frac{weight\ (kg)}{(height\ (ft) \times 0.3048)^2} \]

Where:

\( weight \) — Body weight in kilograms (kg)
\( height \) — Height in feet (ft) converted to meters (1 ft = 0.3048 m)

Explanation: The height in feet is first converted to meters by multiplying by 0.3048, then the standard BMI formula is applied.

3. Importance of BMI Calculation

Details: BMI provides a simple numeric measure of a person's thickness or thinness, allowing health professionals to discuss weight problems more objectively with their patients.

4. Using the Calculator

Tips: Enter weight in kilograms and height in feet. All values must be valid (weight > 0, height > 0).

5. Frequently Asked Questions (FAQ)

Q1: What are the standard BMI categories?
A: Underweight (<18.5), Normal weight (18.5-24.9), Overweight (25-29.9), Obesity (≥30).

Q2: Is BMI accurate for everyone?
A: BMI may overestimate body fat in athletes and underestimate it in older people who have lost muscle mass.

Q3: Why convert height from feet to meters?
A: The standard BMI formula uses metric units (kg/m²), so we need to convert imperial measurements to metric.

Q4: How often should I check my BMI?
A: For most adults, checking BMI once or twice a year is sufficient unless you're actively trying to change your weight.

Q5: Should children use this calculator?
A: No, children and teens need age- and sex-specific BMI percentiles rather than the adult categories.