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Calctive

BMI Calculator

Calculate your Body Mass Index (BMI) to determine if you are in a healthy weight range based on your height and weight.

Input Values

💡Health Tips

  • •BMI is most accurate for adults aged 20-65
  • •Athletes may have higher BMI due to muscle mass
  • •Combine BMI with waist circumference for better health assessment

Results

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Enter values and calculate

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How to Use

  1. 1Select your preferred unit system (Metric or Imperial)
  2. 2Enter your weight (kg or lbs)
  3. 3Enter your height (cm or inches)
  4. 4Click Calculate to see your BMI and category
  5. 5Review the health category and recommended range
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Formula

Metric: BMI = weight (kg) / height (m)²
Imperial: BMI = (weight (lbs) / height (in)²) × 703

Categories:
• Underweight: BMI < 18.5
• Normal: 18.5 ≤ BMI < 25
• Overweight: 25 ≤ BMI < 30
• Obese: BMI ≥ 30
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Common Use Cases

Track your weight loss or gain progress over time
Determine if you need to adjust your diet or exercise routine
Assess health risks associated with being under or overweight
Set realistic weight goals based on healthy BMI range