UN-Calculator includes a full suite of health and fitness calculators backed by standard physiological equations used by dietitians and fitness coaches worldwide. Our Calorie Calculator uses the Mifflin-St Jeor equation to compute your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) based on your age, height, weight, gender, and activity level. The results also show tailored calorie targets for fat loss, muscle gain, and maintenance.
Beyond the calorie calculator, you'll find a BMI & Healthy Weight calculator, an Ideal Body Weight tool using Robinson, Miller, Devine, and Hamwi formulas, a Macro Calculator that splits your daily calories into precise carbohydrate, protein, and fat grams, a Running Pace calculator with Karvonen Heart Rate zone analysis, and much more. As a comprehensive online health calculator platform, we've built everything you need to track, measure, and improve your physical wellbeing.