Bmi Calculator Pounds And Feet Conversion

BMI Formula:

\[ BMI = \frac{weight\ (lbs) \times 703}{(height\ in\ inches)^2} \]

Body Mass Index (BMI):

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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. This calculator uses pounds and feet/inches with appropriate conversion factors.

2. How Does the Calculator Work?

The calculator uses the following formula:

\[ BMI = \frac{weight\ (lbs) \times 703}{(height\ in\ inches)^2} \]

Where:

\( weight \) — Weight in pounds (lbs)
\( height \) — Height converted to inches (feet × 12 + inches)
703 — Conversion factor (kg/m² to lbs/inches²)

Explanation: The equation converts imperial units (pounds and inches) to produce a BMI value equivalent to the metric calculation.

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 pounds, height in feet and inches. All values must be valid (weight > 0, height > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is a healthy BMI range?
A: For adults 20 and older: Underweight (<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 persons who have lost muscle mass.

Q3: Should children use this calculator?
A: No, children and teens need age- and sex-specific percentiles rather than the adult BMI categories.

Q4: What's better than BMI?
A: For individuals, measures like waist circumference and body fat percentage may be better indicators.

Q5: Why 703 in the formula?
A: It's the conversion factor (703 kg/m² = lbs/inches²) to make imperial units equivalent to metric BMI.