Use this BMI Calculator to calculate your Body Mass Index from height and weight. Choose US Units or Metric Units to calculate BMI and view your BMI category and healthy BMI range.
How to Calculate BMI
BMI formula: BMI = weight in kilograms ÷ height in meters squared.
BMI Chart and BMI Table for Adults
| BMI Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 to below 25 | Healthy weight |
| 25 to below 30 | Overweight |
| 30 or higher | Obesity |
Healthy BMI Range
For adults, a commonly used healthy BMI range is 18.5 to below 25. Your healthy weight range depends on your height.
BMI Calculator US Units
Enter height in feet and inches and weight in pounds.
BMI Calculator Metric
Enter height in centimeters and weight in kilograms.
BMI Weight Calculator for Men and Women
This BMI weight calculator can be used by adult men and women. Adult BMI category cutoffs are generally the same, although individual interpretation can vary.
BMI for Children and Teens
Children and teens need age- and sex-specific BMI-for-age percentiles rather than adult BMI categories. This adult calculator is not intended to diagnose weight status in children or teens.
BMI Calculator for Adults: How to Use It
Our BMI Calculator is designed for adults who want a quick estimate of Body Mass Index using either US units or metric units. Enter your height and weight, choose the correct unit system, and select Calculate BMI. The result shows your BMI number, weight category, healthy BMI range, and an estimated healthy weight range for your height.
For the most useful result, enter current measurements as accurately as possible. BMI can be a helpful screening tool, but it does not directly measure body fat, muscle mass, bone density, or overall health. Athletes, older adults, pregnant people, and individuals with higher muscle mass may need a more individualized assessment.
How to Interpret Your BMI Result
A BMI result is best viewed as one part of a broader health picture. Adults are commonly grouped into underweight, healthy weight, overweight, and obesity categories. These categories can help identify possible weight-related health risks, but they should not be treated as a diagnosis on their own.
If your BMI falls outside the healthy range or you have concerns about weight, nutrition, or medical conditions, consider discussing the result with a qualified healthcare professional who can interpret it alongside other factors.
BMI Calculator FAQs
What is BMI?
BMI is a screening measure based on height and weight used to categorize adult weight status.
How do I calculate BMI?
Enter your age, height and weight and select Calculate BMI.
What is a healthy BMI?
For adults, 18.5 to below 25 is commonly categorized as healthy weight.
Can men and women use the same BMI calculator?
Yes. This adult BMI calculator can be used by both men and women.
Is this BMI calculator for children and teens?
No. Children and teens need BMI-for-age interpretation.
Final Thoughts on Using a BMI Calculator
A BMI Calculator is a simple way to estimate weight status from height and weight. Use the result as a starting point, compare it with the BMI chart and healthy BMI range, and remember that BMI is a screening measure rather than a complete assessment of health.
For more health-related guides and tools, visit our Health section.
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