TDEE Explained
Total Daily Energy Expenditure. It's the total number of calories your body burns in a day — everything from breathing and thinking to walking to the fridge and running marathons. If you want to lose weight, gain muscle, or even maintain your current state, TDEE is the starting point. Everything else is math built on top of it.
TDEE has three components: BMR (your body's baseline), the thermic effect of food (digestion), and physical activity. Activity is the wildcard — it ranges from someone who sits at a desk all day to someone who works construction and hits the gym after.
Activity Multipliers
The most common way to estimate TDEE is to multiply BMR by an activity factor. These aren't exact — they're estimates — but they give you a working number:
- Sedentary (office job, little exercise) — BMR × 1.2
- Lightly active (light exercise 1-3 days/week) — BMR × 1.375
- Moderately active (moderate exercise 3-5 days/week) — BMR × 1.55
- Very active (hard exercise 6-7 days/week) — BMR × 1.725
- Extremely active (physical job + daily training) — BMR × 1.9
Try our TDEE calculator to get your estimate instantly.
Why This Number Isn't Perfect
TDEE estimates have a margin of error of about 10-15%. Your actual daily burn might be 200-300 calories higher or lower than the estimate depending on your NEAT (Non-Exercise Activity Thermogenesis — the energy you spend fidgeting, pacing, and going about your day), your muscle mass, and individual metabolic variation.
The practical solution: use your TDEE estimate as a starting point. Track your weight over 2-3 weeks. If you're gaining when you expected to maintain, you're eating above your real TDEE. If you're losing faster than planned, you're below it. Adjust by 100-200 calories and reassess.
The Takeaway
TDEE is the foundation. Calculate it, use it as your anchor, and adjust based on real-world results. The number in the calculator is a useful estimate. The scale over time is the truth.