TDEE — Total Daily Energy Expenditure — is the total number of calories your body burns in a day. It includes everything: your resting metabolism, the energy cost of digestion, and every step, workout, and movement you make. It is the master calorie number behind every effective diet, bulk, or maintenance plan.
Why TDEE Matters More Than BMR
BMR (Basal Metabolic Rate) is what you burn just to exist — lying perfectly still, not digesting food, just keeping your organs running. For most adults, BMR accounts for 60–75% of total daily calorie burn.
TDEE = BMR × Activity Multiplier
Nobody is sedentary all day. Your TDEE accounts for the extra energy you spend moving, exercising, and digesting food (called the thermic effect of food, which adds roughly 10% on top).
How to Calculate TDEE Step by Step
Step 1: Find Your BMR
Use the Mifflin-St Jeor equation (most accurate for general use):
- Men: BMR = (10 × kg) + (6.25 × cm) − (5 × age) + 5
- Women: BMR = (10 × kg) + (6.25 × cm) − (5 × age) − 161
Step 2: Apply Your Activity Multiplier
| Activity Level | Multiplier | Who It Fits |
|---|---|---|
| Sedentary (desk job, no gym) | 1.20 | Office worker, minimal movement |
| Lightly active (1–3 gym sessions/week) | 1.375 | Casual gym-goer, some walking |
| Moderately active (3–5 sessions/week) | 1.55 | Regular gym sessions + active job |
| Very active (6–7 hard sessions/week) | 1.725 | Athletes, physical tradespeople |
| Extra active (2-a-day training) | 1.90 | Elite athletes, manual labourers |
Example Calculation
30-year-old male, 80 kg, 178 cm, moderately active:
- BMR = (10 × 80) + (6.25 × 178) − (5 × 30) + 5 = 800 + 1112.5 − 150 + 5 = 1,767.5 kcal
- TDEE = 1,767.5 × 1.55 = 2,740 kcal/day
This person needs 2,740 calories per day to maintain their current weight.
TDEE by Goal
| Goal | Calorie Target | Rationale |
|---|---|---|
| Fat loss | TDEE − 20% | Sustainable deficit without muscle loss |
| Aggressive fat loss | TDEE − 30% | Faster, higher muscle-loss risk |
| Maintenance | TDEE | No change in body composition |
| Lean bulk | TDEE + 10% | Slow muscle gain, minimal fat gain |
| Standard bulk | TDEE + 15–20% | Faster muscle gain, some fat gain |
For the example above (2,740 kcal TDEE):
- Fat loss target: 2,740 × 0.80 = 2,192 kcal/day
- Lean bulk target: 2,740 × 1.10 = 3,014 kcal/day
TDEE Is Not Static
Your TDEE changes when:
- Your body weight changes (lighter = lower BMR)
- Your activity level changes (new job, injury, more training)
- Your age increases (BMR drops ~1–2% per decade after 30)
Recalculate TDEE every 4–8 weeks, especially when you are in an active cutting or bulking phase.
The Thermic Effect of Food
One component of TDEE often overlooked is the Thermic Effect of Food (TEF) — the energy cost of digesting and metabolising food. It accounts for approximately 10% of TDEE:
- Protein has the highest TEF: 20–30% of its calories are burned in digestion
- Carbohydrates: 5–10%
- Fats: 0–3%
This is one reason high-protein diets promote satiety and maintain metabolic rate during a calorie deficit.
Calculate Your TDEE Now
Use our TDEE Calculator to find your exact daily energy expenditure in under 30 seconds. You can also use the BMR Calculator to see your resting metabolic rate, and the Calorie Calculator to set your daily target based on your weight goal.
Calorie targets are estimates based on population averages. Individual metabolism varies. Consult a registered dietitian for a personalised plan.