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This BMI calculator helps you determine your Body Mass Index using your height and weight. BMI is a widely used indicator of healthy body weight and helps identify weight categories for health assessment.

BMI Calculator

Important Medical Disclaimer: BMI is a screening tool and does not account for muscle mass, bone density, age, sex, or ethnicity. Athletes, bodybuilders, pregnant women, elderly individuals, and children should not rely solely on BMI. This tool is not a substitute for professional medical advice. Always consult with a healthcare provider for personalized health assessments.
Privacy: All calculations are done in your browser. No data is uploaded or stored.

How to Use

  1. Select your preferred unit system (Metric or Imperial)
  2. Enter your weight and height in the appropriate fields
  3. Click "Calculate BMI" to see your results
  4. View your BMI value, category, and health recommendations

Common Uses:

  • Health Assessment: Track your weight status and monitor changes over time
  • Fitness Goals: Set realistic weight loss or gain targets based on BMI ranges
  • Medical Screening: Quick health indicator for doctor visits and checkups
  • Insurance Applications: Many health and life insurance forms require BMI information
  • Weight Management: Understand if your current weight is in a healthy range
  • Athletic Training: Monitor body composition changes during training programs

BMI Categories:

  • Underweight: BMI less than 18.5 - May indicate malnutrition or health issues
  • Normal Weight: BMI 18.5-24.9 - Associated with lower health risks
  • Overweight: BMI 25-29.9 - Increased risk of health problems
  • Obese: BMI 30 or greater - Higher risk of serious health conditions

Frequently Asked Questions

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 (kg/m²). For imperial units, it's weight in pounds divided by height in inches squared, multiplied by 703.

Is BMI an accurate measure of health?

BMI is a useful screening tool but has limitations. It doesn't distinguish between muscle and fat, so athletes may have high BMI despite being healthy. It also doesn't account for age, gender, or body composition. Use it as one indicator among others, and consult healthcare professionals for personalized advice.

What is a healthy BMI range?

A healthy BMI for most adults is between 18.5 and 24.9. However, ideal ranges may vary based on age, ethnicity, muscle mass, and other factors. Always consult with a healthcare provider for personalized health assessments.

Is my weight and height data saved or stored?

No. All BMI calculations happen locally in your browser. Your weight, height, and results are never sent to our servers or stored anywhere. Your privacy is completely protected.

Why does my BMI seem high even though I'm fit?

BMI doesn't distinguish between muscle and fat. Athletes and people with high muscle mass may have elevated BMI despite being very healthy. If you're physically active with lots of muscle, other measures like body fat percentage may be more appropriate.

Should children use the same BMI calculator as adults?

No. Children and teens (ages 2-19) require age and gender-specific BMI percentile charts because their body composition changes as they grow. This adult BMI calculator is only appropriate for ages 20 and older.

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