Frequently Asked Questions
What is BMI?
BMI (Body Mass Index) is a number calculated from your height and weight. It's used as a screening tool to indicate whether you're underweight, normal weight, overweight, or obese.
How is BMI calculated?
BMI is calculated by dividing your weight in kilograms by your height in meters squared (kg/m²). In imperial units, the formula is (weight in lbs × 703) ÷ (height in inches)². BMI Wiz handles all the math for you automatically.
What is a healthy BMI range?
A BMI between 18.5 and 24.9 is considered normal weight. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is considered obese according to standard guidelines.
Is BMI accurate for everyone?
BMI is a useful general screening tool but has limitations. It doesn't account for muscle mass, bone density, age, or fat distribution. Athletes may show a high BMI despite low body fat, and older adults may show a normal BMI with higher fat levels. Always consult a healthcare provider for a complete picture.
Does BMI differ for men and women?
The standard BMI formula and categories are the same for adult men and women. However, women generally carry more body fat than men at the same BMI, which is a known limitation of using BMI alone as a health measure.