Free & precise: Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor formula – for women and men.
Formula: Men = 10×weight + 6.25×height − 5×age + 5 · Women = 10×weight + 6.25×height − 5×age − 161
Your calorie need describes the amount of energy your body requires daily to maintain all vital functions and manage your everyday activities. It consists of two components: the Basal Metabolic Rate (BMR) – the energy consumed at rest – and the Total Daily Energy Expenditure (TDEE), which additionally accounts for your physical activity. Knowing your calorie need allows you to lose weight, gain weight, or maintain your current weight – without guessing.
Our free calorie calculator uses the scientifically validated Mifflin-St Jeor formula, recommended by nutrition experts worldwide as the most accurate method for calculating basal metabolic rate. Enter your sex, age, height, weight, and activity level – the calculator instantly provides your personal BMR and TDEE in kilocalories (kcal).
We recommend recalculating every 4–8 weeks or after significant weight changes (±3 kg), changes in activity level, or hormonal changes (e.g., pregnancy, menopause).
The Mifflin-St Jeor formula is optimized for adults (approximately 18 years and older). For children and teenagers, different reference values apply – please consult a nutrition professional in this case.
The Basal Metabolic Rate (BMR) is the energy your body consumes at complete rest – for heartbeat, breathing, and cell regeneration. The Total Daily Energy Expenditure (TDEE) multiplies the BMR by your activity factor and indicates how many calories you actually burn per day. For nutrition planning, TDEE is the key figure.