What is TDEE and why does it matter?

TDEE (Total Daily Energy Expenditure) is the total number of calories your body burns in a 24-hour period, including all sources: basal metabolism, physical activity, food digestion, and non-exercise movement. It matters because TDEE determines whether you gain, lose, or maintain weight. Eating above TDEE causes weight gain, eating below causes weight loss, and eating at TDEE maintains your current weight. For example, a moderately active 30-year-old man with a TDEE of 2,700 would eat 2,200 calories per day for fat loss (500 deficit) or 3,000 for muscle gain (300 surplus). Without knowing your TDEE, you are essentially guessing your calorie needs.

How do I accurately determine my activity level?

Choose your activity level based on your average week, not your best week. Sedentary means a desk job with no structured exercise (walking less than 4,000 steps daily). Lightly active means light exercise 1-3 days per week or 5,000-7,500 daily steps. Moderately active means structured exercise 3-5 days per week. Very active means hard exercise 6-7 days per week or a physically demanding job combined with exercise. Extra active applies to competitive athletes training twice daily or people with very physical jobs who also exercise intensely. Most office workers who exercise 3-4 times per week fall into the "moderately active" category. When in doubt, choose one level lower and adjust upward based on real-world weight tracking.

What is the difference between TDEE and BMR?

BMR (Basal Metabolic Rate) measures only the calories burned at complete rest for basic survival functions like breathing and circulation, typically 60-70% of total daily expenditure. TDEE includes BMR plus all additional energy burned through physical activity, food digestion (thermic effect of food), and non-exercise movement (NEAT). TDEE is always higher than BMR, usually by 20-90% depending on activity level. For a sedentary person, TDEE might be 20% above BMR; for an athlete, it could be 90% above. You should plan your calorie intake around TDEE, not BMR, because eating at BMR level means you are underfueling all your daily activities.

How should I adjust calories based on my TDEE?

For weight loss, eat 300-500 calories below your TDEE to lose approximately 0.25-0.5 kg per week (a sustainable pace that preserves muscle). For muscle gain, eat 200-400 calories above your TDEE while following a progressive resistance training program. For maintenance, eat at your TDEE. Use your calculated TDEE for 2-3 weeks, then check the trend on the scale. If your weight is not moving in the desired direction, adjust by 100-200 calories. Remember that TDEE is an estimate with roughly 10% margin of error, so real-world tracking is essential for fine-tuning. Recalculate every time your weight changes by 3-5 kg.

Why has my weight loss stalled even though I am eating below TDEE?

Weight loss plateaus are common and have several causes. First, as you lose weight, your TDEE decreases because your body requires less energy to function at a lighter weight. You may need to recalculate and reduce calories further. Second, metabolic adaptation can lower your BMR by 5-15% below predicted levels during extended dieting. Third, water retention from stress, sodium intake, hormonal cycles, or new exercise routines can mask fat loss on the scale. Fourth, you may be consuming more calories than you think due to portion creep or untracked snacks. Try recalculating your TDEE at your current weight, verifying food intake accuracy, and looking at the 4-week trend rather than daily fluctuations.

Does TDEE change on rest days vs. training days?

Yes, your actual TDEE is higher on days when you exercise and lower on rest days. A typical strength training session burns 200-400 additional calories, while intense cardio like running or cycling can burn 400-800 calories per hour. Some people use "calorie cycling" to account for this, eating more on training days and less on rest days while keeping the weekly total the same. For example, if your average TDEE is 2,500, you might eat 2,800 on training days and 2,200 on rest days. However, for simplicity, most nutrition coaches recommend using a consistent daily average and focusing on the weekly trend rather than daily fluctuations.

TDEE Calculator

Quick Answer

Total Daily Energy Expenditure (TDEE) is the number of calories you burn per day, calculated as your Basal Metabolic Rate multiplied by an activity factor (1.2 sedentary to 1.9 very active). This TDEE calculator uses the Mifflin-St Jeor equation, the most accurate BMR formula per the Academy of Nutrition and Dietetics.

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Unit System

Age

Gender

Weight (kg)

Height (cm)

Activity Level

Basal Metabolic Rate (BMR)

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Your TDEE

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TDEE at Every Activity Level

Sedentary—

Lightly Active—

Moderately Active—

Active—

Very Active—

Suggested Macronutrient Split (30/40/30)

Protein

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Carbs

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Fat

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How TDEE Works

Total Daily Energy Expenditure (TDEE) is the total number of calories your body burns in a 24-hour period, combining all sources of energy expenditure. It is the single most important number for weight management: eating above your TDEE causes weight gain, eating below causes weight loss, and eating at your TDEE maintains your current weight. According to the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), understanding energy balance is the foundation of evidence-based weight management.

TDEE consists of four components: Basal Metabolic Rate (BMR, 60-70% of total), the Thermic Effect of Food (TEF, ~10%), Non-Exercise Activity Thermogenesis (NEAT, 15-30%), and Exercise Activity Thermogenesis (EAT, 5-10% for most people). The Academy of Nutrition and Dietetics recommends the Mifflin-St Jeor equation as the most accurate method for estimating BMR, which this calculator uses as the foundation for TDEE calculation.

Use this calculator to establish your baseline TDEE, then pair it with our Calorie Calculator for goal-specific targets and our Macro Calculator to divide those calories into optimal protein, carb, and fat ratios.

The TDEE Formula

TDEE Calculation:

TDEE = BMR × Activity Multiplier

The Mifflin-St Jeor BMR equations:

Men: BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age) + 5
Women: BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age) − 161

Worked example: A 30-year-old man, 80 kg, 178 cm, moderately active (exercises 3-5 days/week). BMR = (10 × 80) + (6.25 × 178) − (5 × 30) + 5 = 800 + 1,112.5 − 150 + 5 = 1,767.5 cal/day. TDEE = 1,767.5 × 1.55 = 2,740 calories/day. To lose 0.5 kg per week, he would eat approximately 2,240 calories (500 below TDEE).

Key Terms You Should Know

Basal Metabolic Rate (BMR) is the calories your body burns at complete rest to sustain basic life functions. It is the foundation of TDEE and typically represents 60-70% of total daily calories. Calculate yours with our BMR Calculator.

Non-Exercise Activity Thermogenesis (NEAT) encompasses all movement that is not intentional exercise: walking to the kitchen, fidgeting, doing household chores, standing at your desk. NEAT varies enormously between individuals, ranging from 200 to 900 calories per day. It is often the most underestimated component of TDEE.

Exercise Activity Thermogenesis (EAT) is the energy burned during deliberate physical exercise. For most people who exercise 3-5 times per week, EAT contributes only 5-10% of TDEE, which is why activity selection for the multiplier matters less than many expect.

Adaptive Thermogenesis is the body's tendency to decrease energy expenditure in response to sustained caloric restriction, beyond what weight loss alone would predict. This metabolic adaptation can reduce TDEE by 5-15% during extended dieting, which is why periodic diet breaks or refeed days are sometimes recommended.

Activity Level Multipliers

The activity multiplier converts BMR to TDEE. These factors, originally developed by Harris and Benedict and refined by subsequent researchers, are used by the FAO/WHO/UNU for energy requirement estimates:

Activity Level	Multiplier	Description	Example TDEE (BMR 1,700)
Sedentary	1.2	Desk job, minimal movement	2,040 cal
Lightly Active	1.375	Light exercise 1-3 days/week	2,338 cal
Moderately Active	1.55	Moderate exercise 3-5 days/week	2,635 cal
Very Active	1.725	Hard exercise 6-7 days/week	2,933 cal
Extra Active	1.9	Intense daily training + physical job	3,230 cal

Practical Examples

Example 1 -- Fat loss: A 40-year-old woman, 72 kg, 165 cm, lightly active (walks 3 times/week). BMR = (10 × 72) + (6.25 × 165) − (5 × 40) − 161 = 720 + 1,031 − 200 − 161 = 1,390. TDEE = 1,390 × 1.375 = 1,911 cal/day. For fat loss at 0.5 kg/week: 1,911 − 500 = 1,411 cal/day. She can plan her protein intake at 1.6 g/kg (115 g) to preserve muscle during the deficit.

Example 2 -- Maintenance: A 25-year-old man, 75 kg, 180 cm, moderately active (gym 4x/week). BMR = (10 × 75) + (6.25 × 180) − (5 × 25) + 5 = 750 + 1,125 − 125 + 5 = 1,755. TDEE = 1,755 × 1.55 = 2,720 cal/day. He eats approximately 2,720 calories to maintain weight and body composition.

Example 3 -- Muscle gain: A 28-year-old man, 70 kg, 175 cm, very active (strength training 6x/week). BMR = (10 × 70) + (6.25 × 175) − (5 × 28) + 5 = 700 + 1,094 − 140 + 5 = 1,659. TDEE = 1,659 × 1.725 = 2,862. Lean bulk target: 2,862 + 300 = 3,162 cal/day with protein at 2.0 g/kg (140 g/day).

How to Use Your TDEE Effectively

Treat your TDEE as a starting estimate, not gospel. All formulas have a margin of error of roughly 10%. Use your calculated TDEE for two weeks, weigh yourself daily at the same time, then adjust by 100-200 calories based on the weekly average trend.
Be honest about your activity level. Most people overestimate their activity. If you exercise 3-4 times per week but have a desk job, "moderately active" is appropriate. Selecting "very active" when it does not reflect reality will overestimate your TDEE by 300-500 calories.
Recalculate when your weight changes. For every 5 kg of weight change, recalculate your TDEE. As you lose weight, your BMR decreases and your TDEE drops, which is why weight loss often stalls after several weeks on the same calorie target.
Account for daily variation. Your actual TDEE varies day to day based on sleep, stress, illness, and activity. Using a weekly calorie budget (TDEE × 7) rather than a rigid daily target gives you flexibility to eat more on active days and less on rest days.
Do not go too far below TDEE. A deficit larger than 25% of your TDEE (500-750 calories for most people) increases the risk of muscle loss, hormonal disruption, and metabolic adaptation. Moderate deficits produce better long-term results.
Combine TDEE with macro tracking. Knowing total calories is necessary but not sufficient. Use our Macro Calculator to divide your TDEE into optimal protein, carbohydrate, and fat targets for your goal.

Disclaimer: This calculator provides estimates for informational purposes only and does not constitute medical or dietary advice. Consult a healthcare professional before making significant changes to your diet or exercise routine.