TDEE stands for Total Daily Energy Expenditure — the total number of calories your body burns in a day. It's the single most important number for managing your weight and body composition, because it tells you exactly how much you can eat to maintain, lose, or gain weight.
TDEE vs BMR: What's the Difference?
BMR (Basal Metabolic Rate) is the calories your body burns at complete rest — just to keep you alive. It accounts for breathing, circulation, cell repair, and temperature regulation.
TDEE is your BMR multiplied by how active you are. It's what you actually burn in a normal day, including exercise and everyday movement.
Most people's TDEE is 20–50% higher than their BMR.
Step 1: Calculate Your BMR
The Mifflin-St Jeor equation is the most accurate widely-available formula:
Men:
BMR = 10 × weight (kg) + 6.25 × height (cm) − 5 × age (years) + 5
Women:
BMR = 10 × weight (kg) + 6.25 × height (cm) − 5 × age (years) − 161
Example — 35-year-old man, 80 kg, 180 cm:
BMR = (10 × 80) + (6.25 × 180) − (5 × 35) + 5
= 800 + 1,125 − 175 + 5
= 1,755 calories/day
Step 2: Apply Your Activity Multiplier
| Activity Level | Multiplier | Who It's For |
|---|---|---|
| Sedentary | 1.2 | Desk job, no exercise |
| Lightly active | 1.375 | Light exercise 1–3 days/week |
| Moderately active | 1.55 | Moderate exercise 3–5 days/week |
| Very active | 1.725 | Hard exercise 6–7 days/week |
| Extra active | 1.9 | Hard daily training + physical job |
Example: Our man exercises 4 days/week (moderately active, 1.55):
TDEE = 1,755 × 1.55 = 2,720 calories/day
Step 3: Apply to Your Goal
Once you know your TDEE, adjusting it gives you your daily calorie target:
| Goal | Calorie Target | Expected Rate |
|---|---|---|
| Fat loss (moderate) | TDEE − 300–400 | 0.3–0.4 kg/week |
| Fat loss (aggressive) | TDEE − 500–750 | 0.5–0.75 kg/week |
| Maintain weight | TDEE | Weight stable |
| Lean muscle gain | TDEE + 200–300 | 0.1–0.2 kg/week |
| Muscle gain (bulk) | TDEE + 300–500 | 0.2–0.4 kg/week |
Our example man, fat loss target:
2,720 − 400 = 2,320 calories/day
Choosing the Right Activity Multiplier
This is where most people go wrong. The tendency is to overestimate activity level, which overestimates TDEE and stalls fat loss.
Honest guidelines:
-
Sedentary (1.2): You sit at a desk all day, walk perhaps 3,000–5,000 steps, and don't formally exercise. This applies to more people than they'd like to admit.
-
Lightly active (1.375): You exercise 1–2 times a week with genuine effort, or you walk significantly more than average (8,000+ steps/day) without structured exercise.
-
Moderately active (1.55): You exercise with intensity 3–5 times a week. This is the most common multiplier for people who gym regularly.
-
Very active (1.725): Athletes, people doing two-a-day training, or those with physically demanding jobs on top of regular exercise.
If you're unsure, start with the lower end. You can always eat more if you're losing too fast.
Alternative: The Tracking Method
The most accurate way to find your TDEE is to track it directly:
- Track every calorie you eat for 2 weeks
- Track your weight daily and take an average for each week
- If your weight stayed the same, your average daily calories = your TDEE
- If you gained or lost weight, adjust:
- Lost 0.5 kg? TDEE ≈ your calories + 385
- Gained 0.5 kg? TDEE ≈ your calories − 385
This method is more accurate than any formula because it accounts for your individual metabolism.
Why TDEE Changes Over Time
Weight loss: As you lose weight, your BMR decreases because there's less body mass to maintain. Recalculate your TDEE every 5–10 kg of weight change.
Muscle gain: More muscle mass = higher BMR. One reason to strength train during a fat loss phase.
Metabolic adaptation: Extended calorie restriction causes "metabolic adaptation" — your body becomes more efficient and burns fewer calories than the formula predicts. This is why fat loss often stalls after several months.
Age: BMR decreases by roughly 1–2% per decade after age 30, mainly due to muscle loss.
TDEE for Common Profiles
| Profile | Approximate TDEE |
|---|---|
| Sedentary woman, 60 kg | 1,500–1,700 cal |
| Active woman, 60 kg | 1,900–2,200 cal |
| Sedentary man, 80 kg | 2,000–2,300 cal |
| Active man, 80 kg | 2,500–3,000 cal |
| Elite endurance athlete | 3,500–5,000+ cal |
Common Questions
"My TDEE calculator says 2,500 but I gain weight eating 2,000." This happens. Formulas can overestimate TDEE by 10–20% for some individuals. Use the tracking method to find your true number.
"Should I eat back exercise calories?" If you use the TDEE method (BMR × activity multiplier), no — exercise is already included. If you used a "BMR only" approach and added exercise separately, then yes.
"What about non-exercise movement (NEAT)?" Non-Exercise Activity Thermogenesis — fidgeting, walking, standing — accounts for 200–600+ calories/day and varies enormously between people. People who fidget naturally burn significantly more without any intentional exercise.