What is a healthy BMI?

A BMI between 18.5 and 24.9 is considered healthy for most adults. BMI is a general guideline and may not apply to athletes or children.

Does BMI work for everyone?

BMI is a general screening tool and may not accurately reflect health for athletes, elderly individuals, children, or pregnant women. Consult a healthcare professional for a full assessment.

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BMI Calculator

Calculate your Body Mass Index (BMI) in metric or imperial units. Includes BMI category and healthy weight range for your height.

Height (cm)

Weight (kg)

What is BMI?

Body Mass Index (BMI) is a numerical value calculated from height and weight. It provides a simple screening tool to categorize weight status in adults.

Formula

BMI = Weight (kg) ÷ Height (m)²

For imperial units, the weight and height are converted to metric before calculation.

BMI categories (WHO standard)

BMI Range	Category
Below 18.5	Underweight
18.5 – 24.9	Normal weight
25.0 – 29.9	Overweight
30.0 and above	Obese

How to use this tool

Select Metric (cm/kg) or Imperial (ft+in/lbs)
Enter your height and weight
Click Calculate BMI
See your BMI, category, and healthy weight range

Example use cases

Health screening: Quick check of whether weight is in a healthy range for your height
Fitness goals: Track BMI changes over time alongside exercise
Medical reference: Used as a screening measure by healthcare providers