BMI Calculator
Calculate your Body Mass Index (BMI) to determine if your weight is healthy.
Calculator
How it Works: Formula & Examples
The Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is:
BMI = Weight (kg) / [Height (m)]$^2$
Where:
- Weight is in kilograms (kg)
- Height is in meters (m)
The BMI provides a general guideline to assess if your weight is healthy for your height, but it does not measure body fat directly and should be considered alongside other health assessments.
BMI Categories:
- Underweight: BMI less than 18.5
- Normal weight: BMI between 18.5 and 24.9
- Overweight: BMI between 25 and 29.9
- Obesity: BMI of 30 or greater
Example:
A person weighing 70 kg and standing 175 cm (1.75 m) tall would have a BMI calculated as:
BMI = 70 / (1.75 * 1.75) = 70 / 3.0625 ≈ 22.86
Based on this BMI, the person falls into the "e;Normal weight"e; category.
Frequently Asked Questions
Is BMI accurate for everyone?
BMI is a good general indicator, but it may not be accurate for athletes, bodybuilders, pregnant women, or the elderly, as it does not differentiate between muscle and fat.
What units should I use for weight and height?
You can input weight in kilograms (kg) and height in centimeters (cm). The calculator will convert them internally for the formula.
What should I do if my BMI is not in the normal range?
BMI is one indicator. If your BMI is outside the normal range, it is recommended to consult a healthcare professional for a comprehensive assessment and personalized advice.