Bmi Calculator Foot And Stone Age

BMI Formula:

\[ BMI = \frac{weight (stone) \times 14 \times 703}{(height (feet \times 12 + inches))^2} \]

Weight:

stone

Height:

feet inches

Age:

years

BMI Result:

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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:

\[ BMI = \frac{weight (stone) \times 14 \times 703}{(height (feet \times 12 + inches))^2} \]

Where:

\( weight \) — Weight in stones (1 stone = 14 pounds)
\( feet \) — Height in feet
\( inches \) — Additional height in inches
703 — Conversion factor (kg/m² to lb/in²)

3. Importance of BMI Calculation

Details: BMI is a simple screening tool for weight categories that may lead to health problems. It's used to identify possible weight problems for adults.

4. Using the Calculator

Tips: Enter weight in stones, height in feet and inches, and age in years. All values must be valid (weight > 0, height > 0, age between 2-120).

5. Frequently Asked Questions (FAQ)

Q1: What is a healthy BMI range?
A: For adults, 18.5 to 24.9 is considered healthy. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.

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

Q3: How does age affect BMI interpretation?
A: While BMI categories are the same for all adults, health risks may differ by age. Older adults may have slightly higher optimal BMI.

Q4: Why use stone and feet units?
A: This calculator uses traditional British units. 1 stone = 14 pounds, and 1 foot = 12 inches.

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