How this calculator works
This calculator estimates Basal Metabolic Rate and daily calorie needs using body measurements, age, sex, and activity level. Enter weight, height, age, sex, and activity level to see the estimated BMR and daily calories. Use it for weight management, meal planning, and understanding energy needs. The key inputs are weight, height, age, sex, and activity level. The output is the BMR and the estimated daily calorie target. Real-world applications include diet planning, fitness goals, nutrition tracking, and meal prep. The calculator converts inputs to kilograms and centimeters, estimates BMR with the Mifflin-St Jeor equation, then multiplies by the selected activity factor. BMR is the energy used at rest. Daily calories include movement, exercise, digestion, and everyday activity. Choose the activity level that matches your actual week, not your goal week. Use the result as a starting estimate and adjust based on progress and professional guidance.