BMI Calculator

What Is BMI (Body Mass Index)?

BMI, or Body Mass Index, is a widely used health indicator that measures the relationship between your weight and height. It helps estimate whether your weight is within a healthy range. BMI is an important screening tool for identifying potential health risks associated with being underweight, overweight, or obese.

Supported Measurement Units

Our BMI Calculator allows you to enter height in two different units:

• Centimeters (cm)
• Feet & Inches (ft/in)

You can enter weight in:

• Kilograms (kg)

How to Use the BMI Calculator

1. Select height unit: cm or ft/in.
2. Enter your weight.
3. Enter your height.
4. Click the Calculate BMI button.
5. Your BMI score and category will be displayed instantly.

BMI Categories Explained

Once you calculate your BMI, you will fall into one of these categories:

Underweight (BMI < 18.5)

You may need to gain healthy weight. Consult a nutrition specialist.

Normal Weight (BMI 18.5 – 24.9)

This is considered a healthy weight range for most adults.

Overweight (BMI 25 – 29.9)

Extra weight may increase health risks. Balanced diet and exercise help.

Obese (BMI 30+)

High BMI can increase the risk of chronic diseases. Lifestyle changes are recommended.

BMI Formula

1. BMI Formula (Metric - cm & kg)

BMI = weight (kg) / height (m²)

Example: If your height is 170cm → convert to meters → 1.70m Then: BMI = weight / (1.70 × 1.70)

2. BMI Formula (Imperial - ft/in & lbs)

BMI = (weight (lbs) × 703) / height (in²)

Why Is BMI Important?

BMI is useful because it helps you:

• Understand your overall health level
• Identify if your weight is in a healthy range
• Monitor changes in weight over time
• Reduce risks of heart disease, diabetes, and obesity

Limitations of BMI

While BMI is a helpful screening tool, it does not measure body fat directly. Factors like age, muscle mass, gender, and bone density can influence BMI.

Athletes, for example, may have a high BMI but low body fat because muscle is heavier than fat.

BMI Chart for Adults

Who Should Use the BMI Calculator?

This tool is ideal for:

• Adults above 18 years
• Fitness enthusiasts
• Weight management planners
• Health-conscious individuals
• People monitoring lifestyle changes

Frequently Asked Questions

1. Is the BMI Calculator accurate?

Yes, it uses standardized WHO BMI formulas for accurate calculation.

2. Can BMI be used for children?

BMI ranges for children differ by age and gender. This tool is for adults only.

3. Does BMI show body fat percentage?

No. BMI is a general weight–height ratio, not a fat measurement.

4. Can I use height in feet and inches?

Yes! Our calculator supports both cm and feet/inches.

5. Is this BMI tool free?

Absolutely. It’s 100% free with unlimited use.

Try Our Free BMI Calculator Now

Check your Body Mass Index instantly with our accurate, fast, and easy-to-use BMI Calculator. Enter your height and weight to discover your BMI score and ideal weight category within seconds.