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TDEE Calculator
Total Daily Energy Expenditure — Know Your Calorie Burn
What is a TDEE Calculator?
A TDEE Calculator (Total Daily Energy Expenditure Calculator) is a powerful tool that estimates how many calories your body burns in a single day, taking into account your Basal Metabolic Rate (BMR) and your daily physical activity level. Understanding your TDEE is the foundation of any effective nutrition plan — whether you are trying to lose weight, maintain your current physique, or build muscle mass.
TDEE represents the total number of calories your body expends in 24 hours. It includes energy used for basic life-sustaining functions, digestion of food, and all physical activities. Our calculator above uses the scientifically validated Mifflin-St Jeor equation, widely regarded as the most accurate BMR formula for the general population.
How TDEE is Calculated
Step 1: BMR — Mifflin-St Jeor Equation
Male: BMR = (10 × kg) + (6.25 × cm) − (5 × age) + 5
Female: BMR = (10 × kg) + (6.25 × cm) − (5 × age) − 161
Step 2: Activity Multipliers
| Activity Level | Description | Multiplier |
|---|---|---|
| Sedentary | Little or no exercise, desk job | 1.2 |
| Lightly Active | Light exercise 1–3 days/week | 1.375 |
| Moderately Active | Moderate exercise 3–5 days/week | 1.55 |
| Very Active | Hard exercise 6–7 days/week | 1.725 |
| Extremely Active | Very hard exercise, physical job | 1.9 |
TDEE = BMR × Activity Multiplier
How to Use the TDEE Calculator
1. Select Your Gender
Choose male or female. This determines which Mifflin-St Jeor formula variant the calculator uses.
2. Choose Your Unit System
Toggle between metric (cm/kg) or imperial (ft/lb). The calculator automatically converts between systems.
3. Enter Age, Weight, and Height
Input accurate measurements for reliable results. Age affects BMR as metabolic rate slows approximately 1–2% per decade after age 20.
4. Select Your Activity Level
Be honest — this is where most people overestimate. A desk job plus 3 gym sessions per week is “Lightly Active,” not “Moderately Active.”
5. Review Your Results
See your maintenance TDEE, BMR, and goal-adjusted targets for weight loss (20% deficit), maintenance, and weight gain (15% surplus).
Understanding Your TDEE Results
Maintenance Calories
Eat this many calories daily to maintain your current weight.
Weight Loss
Create a 20% deficit below TDEE for approximately 0.5–1 kg weight loss per week.
Weight Gain / Muscle Building
Eat 15% above TDEE with adequate protein (1.6–2.2 g/kg) and progressive resistance training.
Factors That Influence TDEE
Body Composition
Muscle burns ~6 cal/lb at rest vs ~2 cal/lb for fat. More muscle = higher TDEE.
Age
BMR decreases with age due to sarcopenia. Recalculate annually.
NEAT (Non-Exercise Activity Thermogenesis)
Daily movement like fidgeting, standing, and walking can vary by up to 2,000 calories/day between individuals.
Thermic Effect of Food (TEF)
Digestion burns ~10% of calorie intake. Protein has highest TEF at 20–30%.
TDEE vs BMR
| Metric | BMR | TDEE |
|---|---|---|
| Definition | Calories at complete rest | Total daily calories burned |
| Includes activity? | No | Yes |
| Typical value | 1,200–2,000 cal | 1,600–3,500+ cal |
| Use case | Clinical assessment | Nutrition planning |
| Formula | Mifflin-St Jeor | BMR × Activity Multiplier |
Frequently Asked Questions
How accurate is the TDEE calculator?
The Mifflin-St Jeor equation predicts BMR within ±10% of measured values. Combined with honest activity assessment, it is accurate enough for effective nutrition planning.
Should I use TDEE or BMR for weight loss?
Always use TDEE, not BMR. Eating below BMR can trigger metabolic adaptation, muscle loss, and fatigue. Your calorie target should be between BMR and TDEE.
How often should I recalculate?
Recalculate every 4–6 weeks or after losing/gaining more than 5 kg (11 lb).
Do men and women have different TDEEs?
Yes. Males typically have 10–15% higher TDEE due to greater lean muscle mass.
What if I am not losing weight at my calculated deficit?
Common causes: overestimating activity, underestimating calorie intake, metabolic adaptation. Reduce intake by 100–200 cal/day and reassess after 2 weeks.
Is TDEE the same as maintenance calories?
Yes, TDEE and maintenance calories are the same thing.
Tips for Getting the Most from Your TDEE
1. Track food accurately using a food scale for 1–2 weeks.
2. Weigh consistently: same time, same scale, same conditions.
3. Adjust based on data. If the scale is not moving after 2 weeks, adjust calories.
4. Combine with quality nutrition. 2,000 calories of whole foods produces dramatically different results than 2,000 calories of processed food.
5. Use weekly averages for both calorie intake and weight.
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