What is BMI and how is it calculated?

BMI (Body Mass Index) is a measure of body fat based on height and weight. It's calculated by dividing weight in kilograms by height in meters squared, or using the formula: BMI = (weight in pounds × 703) / (height in inches squared).

What are the BMI categories?

BMI categories are: Underweight (< 18.5), Normal weight (18.5 - 24.9), Overweight (25.0 - 29.9), and Obese (≥ 30.0). These categories help assess health risks associated with weight.

Is BMI accurate for everyone?

BMI is a useful screening tool but has limitations. It doesn't distinguish between muscle and fat mass, and may not be accurate for athletes, pregnant women, or the elderly. Always consult healthcare providers for personalized advice.

What is the ideal weight range?

The ideal weight range is calculated based on a BMI between 18.5 and 24.9 for your specific height. This range is associated with the lowest health risks.

Should I be concerned about my BMI result?

BMI is just one health indicator. If your BMI falls outside the normal range, consider consulting with a healthcare provider for a comprehensive health assessment and personalized recommendations.

BMI Calculator — Body Mass Index Online Tool

Understanding Body Mass Index (BMI)

Body Mass Index (BMI) is a widely used screening tool to assess weight status and potential health risks associated with weight. While BMI doesn't directly measure body fat, it provides a useful indicator for most adults.

Our BMI calculator uses the standard formula: BMI = weight (kg) / height (m)² or BMI = (weight (lbs) × 703) / height (inches)². The results help categorize weight status and identify potential health risks.

BMI Categories:

Underweight: BMI less than 18.5 - May indicate nutritional deficiency
Normal weight: BMI 18.5-24.9 - Associated with lowest health risks
Overweight: BMI 25.0-29.9 - May increase risk of health problems
Obese: BMI 30.0 and above - Significantly increased health risks

Important: BMI is a screening tool and doesn't account for muscle mass, bone density, or individual health factors. Always consult healthcare providers for personalized health advice.

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Common Questions

How do I use this tool?

Simply visit our bmi calculator page and follow the intuitive interface. No registration required - just click and use!

Is this tool free to use?

Yes, all our tools are completely free with no usage limits or registration required.