Calculate your Total Daily Energy Expenditure
💡 Why This Matters Your TDEE (Total Daily Energy Expenditure) is the actual number of calories you burn in a full day — BMR plus everything else: walking, working out, digesting food, fidgeting. It's the real number to build any diet or nutrition plan around.
Non-exercise activity — fidgeting, standing, walking around the house — can burn several hundred extra calories a day and varies wildly between individuals, even at the same weight and activity level.
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Total Daily Energy Expenditure (TDEE) represents the total number of calories your body burns in a single day. It encompasses all energy expenditure including Basal Metabolic Rate (BMR) — the calories burned at rest for vital functions — plus calories burned through daily activities, exercise, and the thermic effect of food. Knowing your TDEE is fundamental for weight management because it represents the caloric equilibrium point where your weight stays stable.
This calculator estimates your TDEE by first determining your BMR using the Mifflin-St Jeor equation (considered most accurate for modern populations), then multiplying by an activity multiplier based on your self-reported activity level. The activity levels range from sedentary (little or no exercise) to very active (hard exercise or physical job). The more accurately you report your activity level, the more accurate your TDEE estimate will be.
TDEE isn't static — it changes as your body changes. Muscle mass significantly impacts BMR because muscle tissue burns more calories at rest than fat tissue. As you gain muscle through strength training, your BMR and therefore your TDEE increases. Age also decreases BMR by approximately 2% per decade after age 30. Hormonal changes, sleep quality, and even climate can affect your daily caloric burn. This is why periodic recalculation is recommended.
To lose weight sustainably, a caloric deficit of 300-500 calories daily typically results in approximately 1 pound lost per week — considered safe and sustainable. Extreme deficits can lead to muscle loss, nutritional deficiencies, and metabolic adaptation where your body burns fewer calories. To gain muscle, a surplus of 200-300 calories combined with strength training is generally effective. Track your weight over 2-3 weeks while eating at your calculated level, then adjust based on results.
This calculator provides an excellent starting point, but individual variation can be significant. The thermic effect of food varies between people, non-exercise activity differs widely, and metabolism adapts to caloric intake over time. For best results, use your TDEE as a baseline, track actual weight changes over 2-3 weeks, and make incremental adjustments. Small tweaks of 100-200 calories frequently make the difference between frustration and success.
Example: A 30-year-old man weighing 70 kg at 175 cm with moderate activity: BMR of 1,649 × 1.55 activity multiplier = ~2,556 calories/day to maintain his current weight — roughly 2,006 to lose 0.5 kg/week, or 3,106 to gain 0.5 kg/week.
Not necessarily — eating at TDEE maintains your current weight. Eat below it to lose weight, above it to gain, typically adjusting by 250-500 calories for a gradual, sustainable change.
Activity level is often the single biggest swing factor in TDEE — the difference between sedentary and very active can add over 1,000 calories a day, far more than most other individual variables.
Recalculate whenever your weight changes significantly (5+ lbs/2+ kg) or your activity level shifts, since both directly affect the result — otherwise every few months is reasonable.