BMI Calculator

Calculate your Body Mass Index and ideal weight

Age

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Height (ft & in)

Weight (lbs)

Enter your height and weight to calculate BMI

1What is BMI?

Body Mass Index (BMI) is a simple mathematical formula used to estimate body fat based on a person's weight and height. It is widely used by healthcare professionals as a quick screening tool to categorize individuals into different weight classes, such as underweight, healthy weight, overweight, and obesity. While it doesn't directly measure body fat, it provides a reliable indicator for most people.

2How is BMI Calculated?

The BMI calculation is quite straightforward. It divides your weight by the square of your height. The formulas differ slightly depending on whether you use the metric or imperial system:

Metric Formula

Weight (kg) ÷ [Height (m)]²

Imperial Formula

(Weight (lbs) ÷ [Height (in)]²) × 703

3BMI Categories and Health Implications

Category	BMI Range	Health Implications
Underweight	Below 18.5	May indicate malnutrition or other health problems.
Healthy Weight	18.5 - 24.9	Lowest risk of weight-related diseases.
Overweight	25.0 - 29.9	Increased risk of cardiovascular disease.
Obesity	30.0+	Significantly higher risk of severe health conditions.

Note: BMI does not diagnose the body fatness or health of an individual. Athletes with high muscle mass may have a high BMI without having high body fat.