BMI Calculator
Check your Body Mass Index.
About this tool
The BMI Calculator computes your Body Mass Index from your height and weight, then places the result in the standard WHO underweight, normal, overweight, or obese range. It's a quick screening tool for general weight-related health risk.
How it works
- Select metric (kg/cm) or imperial (lb/in) units.
- Enter your height and weight.
- Your BMI is calculated instantly along with the corresponding weight category.
- Read the contextual guidance for your range.
Example use cases
- Adult health screening: A 5'10" person weighing 175 lb calculates a BMI of 25.1, placing them at the lower end of the 'overweight' category.
- Weight-loss goal setting: Use the calculator to find the weight range that corresponds to a 'normal' BMI for your height, then set that as a target range with your doctor.
Frequently asked questions
What is a healthy BMI?
The WHO defines 18.5-24.9 as the normal range for adults. Values below 18.5 are underweight; 25-29.9 is overweight; 30 and above is obese.
Is BMI the same for men and women?
The same formula applies to both sexes, but body fat distribution differs. Some clinicians use waist circumference or body fat percentage as complementary measures.