Free BMI Calculator Online - Calculate Your Body Mass Index Instantly

What is BMI?

Body Mass Index (BMI) is a simple calculation that estimates body fat based on a person’s height and weight. It is widely used as a screening tool to identify potential weight-related health risks.

BMI Formula

The standard BMI formula is:

BMI=weight (kg)height2 (m)BMI=height2(m)weight(kg)​

For imperial measurements (pounds and inches), the formula adjusts to:

BMI=weight (lbs)×703height2 (in)BMI=height2(in)weight(lbs)×703​

How to Use Our Free BMI Calculator

Our online BMI calculator makes it easy to check your Body Mass Index in seconds.

Steps to Calculate BMI:

1. Select Your Unit System (Metric or Imperial).

2. Enter Your Height (cm/m or ft/in).

3. Enter Your Weight (kg or lbs).

4. Click "Calculate BMI" to see your result.

Why BMI Matters

• Helps assess weight-related health risks.

• Used by doctors and fitness experts for health evaluations.

• A quick way to check if you’re in a healthy weight range.

Note: BMI is a screening tool, not a diagnostic measure. For a complete health assessment, consult a doctor.

Limitations of BMI

• Doesn’t distinguish between muscle and fat (athletes may have high BMI without excess fat).

• Doesn’t account for age, sex, or body composition.

• May not be accurate for pregnant women or very muscular individuals.

Final Thoughts

Monitoring your BMI can help you maintain a healthy weight and reduce health risks. Use our free calculator to check yours today!