BMI Calculator

Calculate your Body Mass Index and healthy weight range

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BMI Categories

UnderweightBMI < 18.5 - 18.5
NormalBMI 18.5 - 25
OverweightBMI 25 - 30
ObeseBMI 30 - 30+

BMI Limitations

  • • Does not distinguish between muscle and fat mass
  • • Athletes may have high BMI due to muscle
  • • Not accurate for children, elderly, or pregnant women
  • • Does not account for body fat distribution
  • • Should be used alongside other health indicators

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BMI Calculator – Check Your Body Mass Index

Body Mass Index (BMI) is a widely used measure to assess whether your weight is healthy relative to your height. Use our free BMI calculator to instantly check your BMI and understand what it means.

BMI Formula

BMI = Weight (kg) ÷ Height (m)²

Or in imperial units: BMI = (Weight in lbs × 703) ÷ (Height in inches)²

BMI Categories

  • Underweight: BMI less than 18.5
  • Normal weight: BMI 18.5 to 24.9
  • Overweight: BMI 25 to 29.9
  • Obese: BMI 30 or greater

Limitations of BMI

While BMI is useful for general screening, it has limitations:

  • Doesn't distinguish between muscle and fat mass
  • Athletes may have "overweight" BMI due to muscle
  • Not accurate for children, pregnant women, or elderly
  • Doesn't account for body fat distribution

Frequently Asked Questions

What is a healthy BMI?

A BMI between 18.5 and 24.9 is considered healthy for most adults.

How accurate is BMI?

BMI is a good general indicator but should be used alongside other measures like waist circumference, body fat percentage, and overall health markers.

Can I have a high BMI and still be healthy?

Yes, especially if you're muscular. Athletes often have high BMI due to muscle mass, not excess fat.