BMI Calculator

Calculate your Body Mass Index and understand your weight category

Calculate Your BMI

Your Body Mass Index
--
Calculate your BMI
Height --
Weight --
Healthy Range --

Your BMI Analysis

Enter your details above to see your BMI results and analysis.

Understanding BMI

Body Mass Index (BMI) is a simple calculation using your height and weight to estimate body fat. It's a widely-used screening tool that helps identify weight categories that may lead to health problems. Simply enter your measurements above to get your BMI and personalized health insights.

Want to Learn More About BMI?

Discover BMI history, detailed limitations, alternative measurements (body fat %, waist-to-height ratio), and personalized recommendations in our comprehensive guide.

Read the Complete BMI Guide →

BMI Categories

BMI Classification
BMI RangeCategoryHealth Risk
Below 18.5UnderweightPossible nutritional deficiency
18.5 - 24.9Healthy WeightLow risk
25.0 - 29.9OverweightModerate risk
30.0 - 34.9Obese (Class I)High risk
35.0 - 39.9Obese (Class II)Very high risk
40.0 and aboveObese (Class III)Extremely high risk

Note: BMI is a screening tool. Individual factors like muscle mass and body composition should also be considered. Learn more in our complete guide.

Frequently Asked Questions

Is BMI accurate for everyone?
BMI is a useful screening tool but has limitations. Athletes with high muscle mass may have a high BMI without excess fat. Older adults may have a normal BMI but high body fat percentage. It's best used alongside other measurements.
What's a healthy BMI?
For adults, a healthy BMI ranges from 18.5 to 24.9. This range is associated with the lowest risk of weight-related health problems. However, BMI should be considered alongside other health indicators.
How can I improve my BMI?
To reach a healthy BMI, focus on sustainable lifestyle changes: balanced nutrition, regular physical activity, and gradual weight loss (1-2 pounds per week). Strength training helps preserve muscle mass during weight loss.
What are BMI's limitations?
BMI doesn't account for muscle mass, bone density, or fat distribution. It may overestimate body fat in muscular individuals and underestimate it in older adults. Learn about alternatives in our guide.