How to Calculate Your TDEE (Total Daily Energy Expenditure)
A step-by-step scientific guide to estimating your daily calorie needs and aligning your food intake with your physical goals.
Written by the CalcUni Editorial Team | Published: June 2026
Whether you want to lose stubborn body fat, build lean muscle mass, or simply maintain your current weight, the single most important number you must know is your Total Daily Energy Expenditure (TDEE).
TDEE represents the total number of calories your body burns in a 24-hour period. By calculating this baseline, you can decide exactly how many calories to consume daily to force your body to adapt. In this guide, we will break down the science of metabolism, show you the exact formulas, and explain how to apply them.
1. The Four Components of TDEE
Your daily calorie burn is not just a single static number; it is the sum of four distinct physiological parts:
- Basal Metabolic Rate (BMR): Around 60–75% of your TDEE. This is the energy your body needs to stay alive and support major organs (brain, heart, liver, lungs) at complete rest.
- Thermic Effect of Food (TEF): Around 10% of your TDEE. The energy cost of digesting, absorbing, and processing nutrients. Protein has the highest thermic cost (burning 20-30% of its calories during digestion).
- Exercise Activity Thermogenesis (EAT): Around 5% of your TDEE. The energy expended during deliberate exercise (like running, weight training, or cycling).
- Non-Exercise Activity Thermogenesis (NEAT): Around 15% of your TDEE. The energy spent on daily involuntary movements (like walking, standing, typing, chores, and fidgeting).
2. Calculating BMR (The Starting Point)
Before finding your TDEE, you must calculate your BMR. The most widely accepted clinical formula is the Mifflin-St Jeor Equation:
BMR (Women) = 10 × Weight (kg) + 6.25 × Height (cm) - 5 × Age (years) - 161
3. Multiplying by Your Physical Activity Level
Once you have your BMR, multiply it by the physical multiplier corresponding to your overall movement:
| Activity Level | Multiplier | Description |
|---|---|---|
| Sedentary | 1.2 | Little or no exercise, desk job |
| Light Activity | 1.375 | Light exercise/sports 1-3 days/week |
| Moderate Activity | 1.55 | Moderate exercise/sports 3-5 days/week |
| Very Active | 1.725 | Hard exercise/sports 6-7 days/week |
| Extra Active | 1.9 | Very hard exercise daily, physical job |
4. Adjusting Caloric Intake for Goals
Once you know your TDEE, you can adjust your caloric target to hit your target weights:
- To Maintain Weight: Eat exactly your TDEE.
- To Lose Weight (Cutting): Subtract 300 to 500 calories from your TDEE. This forces your body to tap into stored fat reserves.
- To Gain Weight (Bulking): Add 300 to 500 calories to your TDEE to support muscle building and training recovery.
Summary
TDEE calculations are the scientific baseline of any body transformations. Ready to calculate yours? Use our free interactive TDEE Calculator or estimate your metabolic baseline with the BMR Calculator.