Bmi Calculator Stones And Pounds

BMI Formula:

\[ BMI = \frac{(weight_{stone} \times 14 + weight_{pounds}) \times 703}{height_{inches}^2} \]

Body Mass Index (BMI):

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1. What is BMI?

Body Mass Index (BMI) is a measure of body fat based on height and weight that applies to adult men and women. It provides a simple numeric measure of a person's thickness or thinness.

2. How Does the Calculator Work?

The calculator uses the BMI formula for stones and pounds:

\[ BMI = \frac{(weight_{stone} \times 14 + weight_{pounds}) \times 703}{height_{inches}^2} \]

Where:

\( weight_{stone} \) — Weight in stones
\( weight_{pounds} \) — Additional weight in pounds
\( height_{inches} \) — Height in inches
703 — Conversion factor (kg/m² to lbs/in²)

3. BMI Categories

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

4. Using the Calculator

Tips: Enter weight in stones and pounds (1 stone = 14 pounds), and height in inches. All values must be valid (positive numbers, height > 0).

5. Frequently Asked Questions (FAQ)

Q1: Why use stones and pounds instead of kilograms?
A: This calculator is designed for regions where stone/pound measurements are commonly used (like the UK).

Q2: Is BMI accurate for athletes?
A: BMI may overestimate body fat in muscular individuals as it doesn't distinguish between muscle and fat.

Q3: What's a healthy BMI range?
A: For most adults, 18.5 to 24.9 is considered healthy.

Q4: Can children use this calculator?
A: No, children need age- and sex-specific BMI percentiles.

Q5: Are there better measures than BMI?
A: Waist circumference and body fat percentage may provide additional useful information.