BMI & Health Calculator
A BMI and health calculator computes your Body Mass Index and Basal Metabolic Rate from your height, weight, age, and sex, giving you two core numbers for tracking wellness. BMI places you in a weight category such as underweight, normal, overweight, or obese, while BMR estimates the calories your body burns at complete rest. Together they form a baseline for setting realistic nutrition and fitness goals without replacing a clinician's personalized assessment. BMI is calculated by dividing weight in kilograms by height in meters squared, then compared against World Health Organization cut points. BMR uses the Mifflin-St Jeor equation, which takes weight, height, age, and sex to estimate resting energy expenditure. The tool converts imperial units to metric automatically, displays both results with category labels, and shows a healthy weight range for your height so you can see how far you are from each boundary. Common use cases: Initial weight screening before starting a diet. Estimating calorie targets for meal planning. Tracking fitness progress over months. Completing pre-employment or insurance health forms. Educating patients in clinical settings. Setting realistic weight-loss milestones.