Last updated: 3 October 2026
Reviewed by Jordan Morley, FA Level 2 Football Coach
TDEE (Total Daily Energy Expenditure) is the total energy your body uses in a 24-hour period. It combines BMR (the energy needed at complete rest) with the thermic effect of food and all physical activity. TDEE is calculated by multiplying BMR by an activity factor (1.2 for sedentary; 1.55 for moderately active; 1.9 for extremely active). Eating at TDEE maintains weight; below TDEE causes fat loss; above TDEE allows muscle gain. TDEE changes as you lose or gain weight.
- BMR × activity factor
- 1.2-1.9 multiplier range
- Eating at TDEE = weight maintenance
- Adjusts as body weight changes
In practice
TDEE (Total Daily Energy Expenditure) combines basal metabolic rate with all additional calories burned through daily activity, exercise and food digestion, giving the complete calorie figure needed to maintain current weight — eating below TDEE produces weight loss, eating above it produces weight gain, making it the essential baseline number behind virtually every calorie-based nutrition plan.
FAQ
How is TDEE different from BMR?
BMR is calories burned at complete rest with zero activity; TDEE adds all additional calories burned through daily movement, exercise and digestion on top of BMR, giving the complete daily energy requirement.
How accurate are online TDEE calculators?
They provide a reasonable estimate using standard formulas and activity multipliers, but individual variation means actual TDEE can differ meaningfully from the calculated estimate — tracking actual weight change against intake over a few weeks gives a more personalized, accurate figure.