TDEE: What It Is, How to Calculate It, and Why It's the Most Important Number in Nutrition

The 4 Components of TDEE

• BMR (Basal Metabolic Rate) — 60–70% of TDEE: Calories burned at complete rest keeping organs functioning.
• TEF (Thermic Effect of Food) — 10%: Energy used to digest and process food. Protein has the highest TEF (20–30%).
• EAT (Exercise Activity Thermogenesis) — 5–10%: Calories burned during planned workouts.
• NEAT (Non-Exercise Activity Thermogenesis) — 15–50%: Calories burned through all movement outside the gym — walking, fidgeting, household tasks. This is the most variable component and why two people can have wildly different TDEEs despite similar BMRs.

Calculate Your TDEE

Step 1: Calculate your BMR

Step 2: Multiply by your activity factor:

• Sedentary (desk job, 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
• Extremely active (physical job + exercise): BMR × 1.9

Common TDEE Mistakes

• Overestimating activity level (most people choose "moderately active" but are closer to "lightly active")
• Not recalculating as body weight changes (TDEE drops as you lose weight)
• Ignoring NEAT — optimizing your gym time while sitting 10 hours a day won't work

Yedimmi Automatically Tracks Your Daily Balance

Enter your profile data once in Yedimmi and your TDEE is calculated automatically. As you log meals via AI photo tracking and record exercise, your real-time calorie balance updates. Step data from Health Connect and HealthKit is automatically added to your activity count — making your TDEE estimate progressively more accurate over time.