What Is TDEE and How Do You Calculate It? (Total Daily Energy Expenditure Guide 2026)

What Is TDEE?

TDEE stands for Total Daily Energy Expenditure — the total number of calories your body burns in a day across all activities. It's the sum of four components:

BMR (Basal Metabolic Rate): Calories burned at complete rest — keeping your heart beating, lungs breathing, organs functioning. This accounts for 60–75% of your TDEE.
NEAT (Non-Exercise Activity Thermogenesis): Calories from all the movement that isn't formal exercise — walking to your car, fidgeting, cooking, typing. This varies hugely between people (200–1,000 calories/day).
EAT (Exercise Activity Thermogenesis): Calories burned during intentional exercise — gym sessions, runs, cycling.
TEF (Thermic Effect of Food): Energy needed to digest food. Roughly 8–15% of the calories you eat — protein has the highest thermic rate at 20–30%.

Step 1: Calculate Your BMR

The Mifflin-St Jeor equation is the most accurate formula for estimating BMR in modern research:

For Men:

BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age in years) + 5

For Women:

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

Quick conversions: lbs ÷ 2.205 = kg | (inches × 2.54) = cm

Worked Example

35-year-old woman, 140 lbs (63.5 kg), 5'5" (165 cm):

BMR = (10 × 63.5) + (6.25 × 165) − (5 × 35) − 161

= 635 + 1,031.25 − 175 − 161

BMR ≈ 1,330 calories/day

Step 2: Multiply by Your Activity Factor

BMR only tells you what you'd burn lying completely still. TDEE = BMR × activity multiplier.

Activity Level	Description	Multiplier
Sedentary	Desk job, little or no 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
Extremely Active	Physical job + daily training	× 1.9

Continuing our example — she exercises 4 days a week (moderately active):

TDEE = 1,330 × 1.55

TDEE ≈ 2,062 calories/day

Using TDEE for Weight Loss, Maintenance, or Muscle Gain

Goal	Calorie Target	Expected Result
Fat Loss	TDEE − 300 to 500	0.5–1 lb loss per week
Aggressive Cut	TDEE − 500 to 750	1–1.5 lbs loss per week
Maintenance	= TDEE	Weight stays the same
Lean Bulk	TDEE + 150 to 300	Slow muscle gain, minimal fat

For our example woman with a TDEE of 2,062:

Weight loss target: ~1,562–1,762 calories/day
Maintenance: ~2,062 calories/day
Muscle building: ~2,212–2,362 calories/day

The Most Common TDEE Mistake

People systematically overestimate their activity level. If you have an office job but go to the gym three times a week, you're "lightly active" to "moderately active" at most — not "very active." Choosing too high a multiplier is the number one reason people are surprised when their "clean eating" doesn't result in weight loss.

When in doubt, start with the lower multiplier and see if your weight changes as expected over 2–3 weeks. If you're losing weight faster than target, eat a bit more. If you're not losing weight, your TDEE estimate may be lower than calculated.

💡 TDEE Changes With You

As you lose weight, your TDEE decreases because you have less body mass to maintain. Recalculate every 10–15 pounds of weight change. This is why weight loss tends to slow over time and why plateaus happen — not because your metabolism "broke," but because your maintenance calories dropped with your body weight.

Calculate Your TDEE Now

Our BMR calculator will compute your Basal Metabolic Rate and TDEE in one step — just enter your stats and activity level. Then use the numbers with our calorie calculator to set a precise daily nutrition goal, and our macro calculator to break that calorie target into protein, carbs, and fat targets.

What Is TDEE and How Do You Calculate It? The Complete Energy Expenditure Guide