BMI Calculator — Body Mass Index for Adults
Calculate your Body Mass Index using metric or imperial measurements and see where you fall on the BMI scale.
Your BMI
24.2
Normal
Healthy weight range: 53.5 kg to 72.0 kg
BMI Scale
How to Use the BMI Calculator
- Select your preferred unit system: Metric (kg/cm) or Imperial (lbs/ft/in).
- Enter your height and weight.
- Your BMI is calculated instantly and shown with your category.
- The BMI scale shows where you fall relative to the standard categories.
- The healthy weight range for your height is also displayed.
BMI Formula
For imperial: BMI = (weight in lbs x 703) / height in inches squared
BMI Categories
Underweight
BMI Below 18.5
Normal Weight
BMI 18.5 to 24.9
Overweight
BMI 25.0 to 29.9
Obese
BMI 30.0 and above
Understanding BMI
Body Mass Index (BMI) is a widely used screening tool that estimates body fatness based on weight and height. While it is not a direct measure of body fat, it correlates reasonably well with body fat percentage in most adults and is easy to calculate.
For Indian and Asian populations, health organizations often recommend lower BMI thresholds due to the tendency to carry more visceral fat at lower BMIs. Some Indian guidelines consider overweight as BMI greater than or equal to 23, and obesity at greater than or equal to 25.
BMI is most useful as a population-level screening tool and should not be the sole basis for health decisions. Athletes with high muscle mass may have elevated BMIs despite being very healthy. Always consult a healthcare provider for personalized health advice.
Frequently Asked Questions
What is a healthy BMI range?
A BMI between 18.5 and 24.9 is considered normal/healthy. Below 18.5 is underweight, 25-29.9 is overweight, and 30 or above is obese. For Asian populations, some health organizations suggest lower thresholds.
How accurate is BMI as a health indicator?
BMI is a useful screening tool but has limitations. It does not distinguish between muscle and fat mass, so athletes may have high BMI despite being very fit. It should be considered alongside other health markers.
What is the BMI formula?
BMI = weight in kilograms divided by height in meters squared (kg/m^2). For imperial units, BMI = (weight in pounds x 703) divided by height in inches squared.