BMR & TDEE Calculator
NewCalculate Basal Metabolic Rate and Total Daily Energy Expenditure with Mifflin-St Jeor & Katch-McArdle formulas
About BMR & TDEE Calculator
BMR & TDEE Calculator determines your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE), giving you the scientific baseline needed to achieve body composition goals including fat loss, body recomposition, and muscle growth.
Basal Metabolic Rate measures the exact number of calories your body burns at complete rest to keep your heart, brain, lungs, and kidneys functioning. By combining your BMR with your daily physical activity level, TDEE reveals your true daily calorie maintenance requirement.
Supports both Imperial (lbs, ft/in) and Metric (kg, cm) measurement standards, as well as the gold-standard Mifflin-St Jeor and Revised Harris-Benedict formulas used by dietitians worldwide.
How to Use BMR & TDEE Calculator
- Select Imperial (lbs, ft/in) or Metric (kg, cm) units.
- Enter your age, gender, weight, and height.
- Select your daily physical activity level from Sedentary to Extra Active.
- Review your BMR, TDEE maintenance calories, and targeted fat loss/muscle gain calorie goals.
Privacy & Data Security
BMR & TDEE Calculator processes all operations 100% locally in your web browser memory. Your files, text snippets, and generated outputs are never stored, logged, or uploaded to any remote server.
Frequently Asked Questions
BMR is the energy burned at total rest (sleeping/lying down). TDEE includes BMR plus all physical activity (walking, working, working out). TDEE represents your daily maintenance calories.
To lose approximately 1 lb (0.45 kg) of body fat per week, consume 500 calories below your TDEE daily. For mild weight loss, target 250 calories below your TDEE.
The Mifflin-St Jeor equation is widely recognized by clinical dietitians as the most accurate formula for estimated energy requirements in non-obese and obese adults.
No. Eating below your BMR for extended periods can cause metabolic adaptation, muscle loss, severe fatigue, and nutrient deficiencies. Always target calories between your BMR and TDEE.