⚖️ BMI Calculator

Calculate your Body Mass Index instantly — free, accurate, and easy to use.

📏 Metric / Imperial 🏥 Health categories 📊 BMI visual meter

📐 Measurement System

📏 Height (cm)

Enter height in centimeters

⚖️ Weight (kg)

Enter weight in kilograms

24.2

Your BMI

Normal weight

Underweight
<18.5 Normal
18.5–24.9 Overweight
25–29.9 Obese
≥30

✅ Healthy weight range for your height: —

* BMI is a general screening tool and may not be accurate for athletes, pregnant women, or the elderly.

🧮 What is BMI?

Body Mass Index (BMI) is a screening tool that estimates body fat based on height and weight. It is calculated as:

BMI = weight (kg) / height² (m²)
or (weight in lbs / height in inches²) × 703

BMI categories help identify potential health risks associated with underweight, overweight, or obesity.

📊 BMI Categories (WHO Standard)

Underweight< 18.5
Normal weight18.5 – 24.9
Overweight25 – 29.9
Obese≥ 30

📈 How to Use the BMI Calculator

Select Metric (cm/kg) or Imperial (ft/in, lbs).
Enter your height and weight.
Your BMI, category, and healthy weight range are calculated automatically as you type.
Use the visual meter to see where you fall on the BMI scale.

⚠️ Limitations of BMI

BMI does not distinguish between muscle and fat. Athletes with high muscle mass may have a high BMI but low body fat. It also does not account for age, gender, or distribution of fat. Always consult a healthcare provider for a complete health assessment.

❓ Frequently Asked Questions

For most adults aged 18–65, a BMI between 18.5 and 24.9 is considered healthy. For older adults (65+), a slightly higher BMI (up to 27) may be associated with better health outcomes.

Yes. Because muscle is denser than fat, muscular individuals may have a BMI in the overweight or obese category despite having very low body fat. In such cases, body fat percentage is a better metric.

No. For children and teens, BMI is age- and sex-specific (BMI percentile). This calculator is designed for adults aged 18+.