If you've ever tried to lose weight and failed, there's a good chance you were working without the most important number: your TDEE — Total Daily Energy Expenditure. It's the total number of calories your body burns in a day, and once you know it, weight loss becomes a simple math problem.
What is TDEE?
Your TDEE is the sum of all the energy your body uses in 24 hours. This includes your Basal Metabolic Rate (BMR) — the calories you'd burn just lying still all day — plus the extra energy from moving, exercising, digesting food, and even thinking.
Unlike BMR, TDEE accounts for your lifestyle. Two people with identical bodies can have very different TDEEs depending on how active they are.
How TDEE is Calculated
TDEE is estimated by multiplying your BMR by an activity multiplier:
- Sedentary (little or no exercise): BMR × 1.2
- Lightly active (1–3 days/week): BMR × 1.375
- Moderately active (3–5 days/week): BMR × 1.55
- Very active (6–7 days/week): BMR × 1.725
- Extra active (physical job + daily training): BMR × 1.9
Most people underestimate their calorie intake and overestimate their activity level. Be honest when selecting your multiplier — use the level you maintain most weeks, not your best week.
Using TDEE for Weight Loss
Once you have your TDEE, losing weight is straightforward: eat fewer calories than your TDEE. The deficit you create determines how fast you lose weight.
- Mild loss (0.25 kg/week): TDEE − 275 kcal/day
- Moderate loss (0.5 kg/week): TDEE − 550 kcal/day
- Aggressive loss (1 kg/week): TDEE − 1,100 kcal/day
A deficit of 500–600 calories per day is considered the sweet spot for most people — enough to lose weight steadily without sacrificing muscle or feeling miserable.
Common TDEE Mistakes
1. Not recalculating as you lose weight
As you lose weight, your BMR drops because there's less body to maintain. Recalculate your TDEE every 4–6 weeks or every 5 kg lost to keep your deficit accurate.
2. Ignoring NEAT
Non-Exercise Activity Thermogenesis (NEAT) — fidgeting, walking to meetings, doing housework — accounts for 15–30% of your daily burn. People who move more casually throughout the day burn significantly more calories than those who sit still.
3. Eating back all exercise calories
If your activity multiplier already accounts for your workouts, don't add those calories back on top. You'll erase your deficit entirely.
Calculate Your TDEE Now
Use our free TDEE calculator to find your exact daily calorie target in under 60 seconds.
Open TDEE Calculator →TDEE vs. Other Approaches
Many popular diets (keto, intermittent fasting, paleo) work primarily because they help people eat fewer calories, even if unconsciously. TDEE-based tracking makes that calorie reduction explicit and adjustable — giving you full control over your rate of progress.
The advantage is precision. You're not guessing whether a food "fits" your diet. You're working with a number that's grounded in your own biology.
The Bottom Line
Know your TDEE, create a sustainable deficit, and track your intake for at least 2–3 weeks before drawing conclusions. Weight fluctuates daily due to water, food volume, and hormones. Look at the weekly trend, not the daily number.
Weight loss is rarely linear, but with TDEE as your compass you'll always know which direction you're headed — and exactly what to adjust when progress stalls.