Free BMI Calculator

Check if you're a healthy weight for your height using our instant, regulation-safe Body Mass Index tool.

Calculate Your BMI

cm
kg

What is Body Mass Index (BMI)?

Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in metres squared. A BMI of 25.0 or more is overweight, while the healthy range is 18.5 to 24.9.

Why BMI Matters

High BMI is a risk factor for diseases such as heart disease, high blood pressure, type 2 diabetes, gallstones, breathing problems, and certain cancers.

Limitations of BMI

BMI may overestimate body fat in athletes and others who have a muscular build. It may underestimate body fat in older persons and others who have lost muscle.

BMI Categories Table (WHO)

ClassificationBMI Range (kg/m²)
Underweight< 18.5
Normal range18.5 – 24.9
Overweight25.0 – 29.9
Obese≥ 30.0

Frequently Asked Questions

Related Health Tools

Calorie Calculator

Calculate TDEE and daily calories for weight loss or muscle gain.

Try Tool

Diabetes Risk

Assess your risk of developing Type 2 diabetes.

Try Tool

Insurance Estimator

Esitmate health insurance premiums.

Try Tool

What to Do Next

Based on your BMI, here are recommended next steps for your health journey.

Track Your Weight

Log daily weight to see trends and progress over time.

Calculate Daily Calories

Find your TDEE and set calorie goals for weight management.

Start Weight Loss Path

Get a personalized plan with AI-guided recommendations.