How to Calculate TDEE – Total Daily Energy Expenditure

Your Total Daily Energy Expenditure (TDEE) is the total number of calories your body burns in a 24-hour period, taking into account everything from breathing and digestion to walking, working out, and even fidgeting. Knowing your TDEE is the foundation of any evidence-based nutrition plan, whether your goal is fat loss, muscle gain, or simply maintaining your current weight.

What is the difference between BMR and TDEE?

Your Basal Metabolic Rate (BMR) is the number of calories your body needs to maintain basic life functions at complete rest — heartbeat, breathing, temperature regulation, and organ function. BMR accounts for roughly 60–70% of your total calorie burn. TDEE is higher than BMR because it adds the calories burned through all daily movement and physical activity.

TDEE = BMR × Activity Multiplier

Step 1 – Calculate your BMR

The Mifflin-St Jeor equation is the most widely validated BMR formula for most adults:

• 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

Example: A 30-year-old woman, 65 kg, 165 cm tall: BMR = (10 × 65) + (6.25 × 165) – (5 × 30) – 161 = 650 + 1031.25 – 150 – 161 = 1,370 calories/day

Step 2 – Multiply by your activity level

Choose the activity multiplier that best matches your typical week:

• Sedentary (desk job, little exercise): × 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
• Extra active (physical job + hard training): × 1.9

Using our example above: lightly active woman → TDEE = 1,370 × 1.375 = 1,884 calories/day

This is her maintenance calorie intake — eating this amount keeps her weight stable.

Using TDEE to set your calorie target

Once you know your TDEE, adjusting for your goal is straightforward:

• Weight loss: Eat 300–500 calories below TDEE per day (gradual, sustainable fat loss of 0.3–0.5 kg/week)
• Aggressive weight loss: Eat 500–750 below TDEE (not recommended for more than 12 weeks without medical guidance)
• Maintenance: Eat at TDEE
• Muscle gain (lean bulk): Eat 200–300 above TDEE

For the example above: weight loss target = 1,884 – 400 = 1,484 calories/day

Why people underestimate their activity level

The most common TDEE error is overestimating activity level. Most people who go to the gym 3 times a week but sit at a desk for 8 hours are lightly active, not moderately active. Overestimating your activity multiplier by one level creates a 200–400 calorie discrepancy that explains why many people "eat at a deficit" but don't lose weight.

How TDEE changes as you lose weight

As your body weight decreases, your BMR decreases — a lighter body burns fewer calories at rest. Additionally, metabolic adaptation means the body becomes more efficient at conserving energy during prolonged calorie restriction. This is why fat loss slows down over time even when eating the same amount. Recalculating your TDEE every 4–6 weeks during a diet accounts for this natural adjustment.

TDEE and macronutrient distribution

Once you know your TDEE and calorie target, dividing those calories into macronutrients (protein, carbohydrates, fat) completes your nutrition plan. A general starting point for fat loss:

• Protein: 1.6–2.2 g per kg of body weight (highest priority for muscle retention)
• Fat: 0.8–1 g per kg of body weight (hormone health minimum)
• Carbohydrates: Remaining calories after protein and fat are set

Frequently asked questions about TDEE

What is TDEE? TDEE is Total Daily Energy Expenditure — the total calories your body burns in a day, including BMR and all physical activity.

How many calories below TDEE should I eat to lose weight? A deficit of 300–500 calories per day is considered sustainable for gradual fat loss of approximately 0.3–0.5 kg per week.

Does TDEE change over time? Yes. As you lose weight, your TDEE decreases because your lighter body burns fewer calories. Recalculate every 4–6 weeks during a diet.

Should I eat back exercise calories? If you used the sedentary multiplier and want to add exercise calories on top, you can eat back roughly 50–75% of estimated burn. If you used a higher activity multiplier, those calories are already accounted for.

TDEE vs BMR — what is the difference?

BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest to sustain essential life functions — heartbeat, breathing, temperature regulation, organ function, and cellular maintenance. It accounts for approximately 60–70% of total daily energy expenditure. TDEE (Total Daily Energy Expenditure) is higher than BMR because it adds all the calories burned through daily movement, exercise, digestion, and non-deliberate physical activity.

TDEE = BMR + calories burned through all activity. It is the number that actually determines whether you lose, gain, or maintain weight.

How to calculate TDEE step by step

Step 1 — Calculate BMR using Mifflin-St Jeor:

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

Step 2 — Multiply by activity factor:

• Sedentary (desk job, minimal daily movement): × 1.2
• Lightly active (1–3 light workouts/week): × 1.375
• Moderately active (3–5 moderate workouts/week): × 1.55
• Very active (intense exercise 6–7 days/week): × 1.725
• Extra active (physical job plus training): × 1.9

Complete example — 32-year-old woman, 68 kg, 167 cm, lightly active:

BMR = (680 + 1043.75 – 160 – 161) = 1402.75. TDEE = 1402.75 × 1.375 = 1,929 calories/day

For fat loss: 1,929 – 400 = 1,529 calories/day

The four components that make up TDEE

• BMR (60–70%): Calories burned at complete rest. Largely determined by lean body mass — muscle is metabolically expensive tissue.
• TEF — Thermic Effect of Food (8–15%): Calories burned digesting and processing meals. Protein has the highest TEF (20–30%), meaning 100 calories of protein effectively costs 20–30 calories to process.
• EAT — Exercise Activity Thermogenesis (5–10%): Calories burned during deliberate exercise — gym, running, sports.
• NEAT — Non-Exercise Activity Thermogenesis (15–30%): All movement that is not deliberate exercise — walking to the bus, fidgeting, taking stairs, doing household chores. This component is highly variable between individuals and accounts for much of the TDEE difference between people of similar size.

Why NEAT matters more than most people think

Research shows that NEAT can vary by as much as 2,000 calories per day between individuals of similar body size. A person with a physically active job (construction worker, nurse, teacher) versus a sedentary desk worker at the same body weight may have a TDEE difference of 800–1,200 calories per day purely from NEAT. This is why two people eating the same amount can have dramatically different weight trajectories.

When dieting, the body unconsciously reduces NEAT — you fidget less, walk slower, sit more. This is part of adaptive thermogenesis and explains why fat loss slows over time even at the same calorie intake.

TDEE and fat loss — setting realistic expectations

• A 400-calorie daily deficit = 2,800 calories per week ≈ 0.4 kg fat loss/week
• A 500-calorie daily deficit = 3,500 calories per week ≈ 0.45 kg fat loss/week
• Maximum sustainable fat loss for most people: 0.5–0.75 kg/week
• Faster rates risk muscle loss, extreme hunger, hormonal disruption, and metabolic adaptation

As body weight decreases, TDEE also decreases — a lighter body needs fewer calories. Recalculate TDEE every 4–6 weeks during a fat loss phase to account for this natural adjustment.