BMI Calculator
Calculate your Body Mass Index (BMI) and see which weight category you fall into, plus your healthy weight range.
BMI Scale
Your BMI of 24.2 falls in the “Normal weight” range.
Free Online BMI Calculator (Body Mass Index)
This BMI calculator estimates your Body Mass Index from your height and weight, and tells you which weight category you fall into — underweight, normal weight, overweight, or obese — along with a healthy weight range for your height.
BMI Formula
BMI = weight (kg) ÷ height (m)². For imperial units, BMI = 703 × weight (lb) ÷ height (in)². BMI is a simple screening tool and does not directly measure body fat, so it may not be fully accurate for athletes or very muscular people.
BMI Categories
The standard adult BMI categories used worldwide are:
- Underweight: BMI below 18.5
- Normal weight: BMI 18.5 – 24.9
- Overweight: BMI 25 – 29.9
- Obese: BMI 30 or higher
Frequently Asked Questions
What is a healthy BMI range?
For most adults, a BMI between 18.5 and 24.9 is considered a healthy weight range, according to standard World Health Organization classifications.
Is BMI accurate for everyone?
BMI is a useful general screening tool, but it doesn't account for muscle mass, bone density, or body composition, so it can be less accurate for athletes, bodybuilders, and older adults. A body fat percentage calculator can offer additional insight.
How is BMI calculated?
BMI is calculated by dividing your weight in kilograms by your height in meters squared (kg/m²), or using an equivalent formula for pounds and inches.