Calculate your Total Daily Energy Expenditure (TDEE), Basal Metabolic Rate (BMR), and BMI using the scientifically validated Mifflin-St Jeor equation. Get personalized calorie targets for weight loss, maintenance, and muscle gain. Pure client-side.
Total Daily Energy Expenditure (TDEE) is the total number of calories your body burns in a day, including all physical activities. This calculator uses the Mifflin-St Jeor equation, the most accurate formula for estimating Basal Metabolic Rate (BMR) in healthy adults. TDEE is calculated by multiplying BMR by an activity factor based on your exercise habits. All calculations happen in your browser — no data is sent to any server.