BMI Calculator

ages: 2 - 120

Your Results

Severe <16
Moderate 16-17
Mild 17-18.5
Normal 18.5-25
Overweight 25-30
Obese 30-35
Extreme >35
0 BMI

Category:

BMI Categories
Severe Thinness
< 16
Moderate Thinness
16 - 17
Mild Thinness
17 - 18.5
Normal
18.5 - 25
Overweight
25 - 30
Obese Class I
30 - 35
Obese Class II
35 - 40
Obese Class III
> 40

Understanding Your Body Mass Index (BMI)

Body Mass Index (BMI) is a widely used screening tool that helps assess whether you're at a healthy weight for your height. Our free BMI calculator provides instant, accurate results based on World Health Organization standards.

Why Calculate Your BMI?

BMI calculation is an essential first step in understanding your overall health status. While not a diagnostic tool, BMI helps:

  • Screen for weight categories associated with health problems
  • Track weight changes over time
  • Compare your weight status to the general population
  • Guide healthcare professionals in prevention strategies

BMI Categories and Health Implications

BMI Range Weight Status Health Implications
Below 18.5 Underweight May indicate nutritional deficiencies, weakened immune system
18.5 - 24.9 Normal weight Generally associated with optimal health outcomes
25.0 - 29.9 Overweight Increased risk of various health conditions
30.0 and above Obese Higher risk of serious health complications

How to Use Our BMI Calculator

  1. Enter your height in centimeters or feet/inches
  2. Input your weight in kilograms or pounds
  3. Click "Calculate" to get instant results
  4. Review your BMI category and recommendations

Limitations and Considerations

While BMI is a useful screening tool, it has some limitations:

  • Doesn't account for muscle mass vs. fat mass
  • May not be suitable for athletes or bodybuilders
  • Different considerations for elderly individuals
  • Varies by age, gender, and ethnicity

Taking Action Based on Your BMI

If your BMI falls outside the healthy range (18.5-24.9), consider:

  • Consulting with healthcare professionals
  • Developing a balanced nutrition plan
  • Incorporating regular physical activity
  • Setting realistic health goals
  • Regular health monitoring and check-ups

Expert Tip

Remember that BMI is just one of many health indicators. For a comprehensive health assessment, combine BMI calculations with other measurements like waist circumference, body composition, and regular medical check-ups.

Frequently Asked Questions

It's recommended to check your BMI every 3-6 months, or whenever there's a significant change in your weight or lifestyle.