BMI Calculator
Calculate your Body Mass Index and category.
BMI Categories
What is BMI Calculator?
Body Mass Index (BMI) is a simple measure of body fat based on your height and weight. A BMI calculator tells you whether you are underweight, normal, overweight, or obese.
BMI is calculated by dividing your weight in kilograms by the square of your height in meters. It is a quick screening tool used by doctors worldwide.
How does the BMI Calculator work?
For example, a person weighing 70 kg with a height of 1.75 m has a BMI of 70 / (1.75 × 1.75) = 22.9, which is in the normal range.
BMI categories: below 18.5 underweight, 18.5-24.9 normal, 25-29.9 overweight, 30 and above obese.
How to use the BMI Calculator?
- Enter your weight in kilograms.
- Enter your height in centimeters or feet/inches.
- The calculator shows your BMI and the category you fall into.
Example
Try the calculator with your own numbers
- Enter your values in the input fields above.
- Adjust the values to match your situation.
- The result updates instantly as you change the inputs.
Benefits of using the BMI Calculator
- Quickly assess if your weight is healthy.
- Track changes in your body composition over time.
- Identify health risks associated with being underweight or overweight.
- Set realistic weight management goals.
Who should use the BMI Calculator?
- People tracking their weight, fitness, and daily health numbers.
- Fitness enthusiasts planning workouts, calories, and protein intake.
- Parents monitoring their child's growth and development.
- Anyone preparing for a health check-up or fitness goal.
Tips for getting the most out of the BMI Calculator
- Use your most recent measurements for the most accurate result.
- Re-check periodically as your weight, age, or activity level changes.
- Treat the result as a guideline, not a medical diagnosis — consult a professional for health decisions.
Frequently Asked Questions
Is BMI an accurate measure of health?
BMI is a useful screening tool but does not distinguish between muscle and fat. Athletes may have a high BMI despite low body fat.
What is a healthy BMI range?
For adults, a BMI between 18.5 and 24.9 is considered healthy. Below 18.5 is underweight, and 25 or above is overweight or obese.
Does BMI differ for men and women?
The BMI categories are the same for adult men and women, though body composition differs. For children, age and gender-specific charts are used.
Small daily decisions add up. Use this calculator to track your numbers and make healthier choices with confidence.
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