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BMI Calculator – Calculate Your Body Mass Index
Get your Body Mass Index using our accurate calculator. Understand what your BMI means for your health and fitness goals.
Understanding BMI Categories
Underweight
BMI: Below 18.5
May need to gain weight for health
Normal Weight
BMI: 18.5 - 24.9
Healthy weight range
Overweight
BMI: 25.0 - 29.9
May need to lose weight
Obese Class I
BMI: 30.0 - 34.9
Health risks increase
Obese Class II
BMI: 35.0 - 39.9
Significant health risks
Obese Class III
BMI: 40.0+
Severe health risks
Essential Tools for Health & Fitness
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What is BMI?
Body Mass Index (BMI) is a simple calculation that uses your height and weight to estimate body fat. It's calculated by dividing your weight in kilograms by your height in meters squared. While BMI doesn't directly measure body fat, it provides a reasonable estimate for most people and is widely used by healthcare professionals.
How It's Calculated
The BMI formula is: BMI = weight (kg) ÷ height (m)². For example, if you weigh 70 kg and are 1.75 m tall, your BMI would be 70 ÷ (1.75 × 1.75) = 22.9. Our calculator automatically handles the unit conversions for both metric and imperial measurements.
Understanding Your Results
BMI categories help identify potential health risks associated with being underweight, overweight, or obese. However, BMI is just one tool and doesn't account for factors like muscle mass, bone density, age, sex, and ethnicity. For a complete health assessment, consult with healthcare professionals who can consider multiple factors.
For a comprehensive understanding of BMI and its implications, check out our complete BMI guide.
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