This NHS BMI calculator checks BMI (body mass index). Use it to calculate adult BMI and child BMI accurately, and get advice and information on healthy weight management.This calculator provides BMI and the corresponding BMI weight status category. Use this calculator for adults, 20 years old and older. Learn more.Body Mass Index (BMI) is a person's weight in kilograms divided by the square of height in meters. A high BMI can be an indicator of high body fatness.Got questions about using the Healthy Body Calculator? Ask Joanne Larsen, registered dietitian and nutrition therapist.A healthy weight is the weight your body naturally settles into when you consistently eat a nutritious diet, are physically active, and balance the Calculate Your Body Mass Index. Body mass index (BMI) is a measure of body fat based on height and weight that applies to adult men and women.From healthy diet plans to helpful weight loss tools, here you'll find WebMD's latest diet news and informationThis site has moved to Please update your bookmarks and click here to visit the new site.Learn how to burn fat and build muscle naturally, backed up by science. The one-stop resource for nutrition and exercise information.Accessible Search Form. Search the NHLBI, use the drop down list to select: the entire site, the Health Topics section only, or the News and Resources section.