What Is TDEE? Total Daily Energy Expenditure, Explained Simply
The 4 parts of your TDEE
Your daily calorie burn is made of four pieces. Here's a typical breakdown for a moderately active adult:
Percentages vary a lot from person to person, especially NEAT and exercise.
| Component | What it is | Typical share |
|---|---|---|
| BMR (Basal Metabolic Rate) | Calories to keep you alive at complete rest: heart, brain, breathing, organs | ~60–70% |
| NEAT (Non-Exercise Activity) | Walking, standing, chores, fidgeting, everything that isn't a workout | ~15–30% (most variable) |
| EAT (Exercise Activity) | Planned workouts: gym, running, sports | ~5–10% (can be more for athletes) |
| TEF (Thermic Effect of Food) | Energy used to digest and absorb food | ~10% |
Surprised that exercise is such a small piece? For most people, daily movement (NEAT) burns more than workouts do. An office worker and a waiter of the same size can differ by 500+ kcal/day from NEAT alone. That's why step count matters. Check yours with the Steps to Calories Calculator.
How TDEE is calculated
Calculators estimate TDEE in two steps: estimate your BMR, then multiply it by an activity factor.
| Activity level | Description | Multiplier |
|---|---|---|
| Sedentary | Desk job, little exercise | 1.2 |
| Lightly active | Light exercise 1–3 days/week | 1.375 |
| Moderately active | Exercise 3–5 days/week | 1.55 |
| Very active | Hard exercise 6–7 days/week | 1.725 |
| Extremely active | Physical job + daily hard training | 1.9 |
A worked example
Lena is 32, female, 165 cm, 68 kg, and works out 3–4 times a week.
- BMR = 10×68 + 6.25×165 − 5×32 − 161 = 680 + 1,031 − 160 − 161 = 1,390 kcal/day
- TDEE = 1,390 × 1.55 (moderately active) = ~2,155 kcal/day
- To maintain: ~2,150 kcal · To lose ~0.4 kg/week: ~1,700 kcal · To gain slowly: ~2,400 kcal
Calculate your TDEE in 30 seconds
Free calculator: your BMR, TDEE, and calorie targets for losing, maintaining, or gaining weight.
What makes TDEE higher or lower?
- Body size: bigger bodies burn more, both at rest and when moving.
- Muscle mass: muscle burns a little more than fat at rest, and more muscle supports more activity. See the Lean Body Mass Calculator.
- Age: TDEE tends to fall slowly with age, mainly from less activity and muscle.
- Sex: men usually have higher TDEE because of larger size and more muscle on average.
- Daily movement (NEAT): the biggest variable you control.
- Dieting: during long calorie deficits, TDEE drops somewhat (lower body weight plus "adaptive thermogenesis"). That's why you should recalculate every few weeks.
How to find your REAL TDEE (better than any calculator)
- Use a calculator to get your starting estimate.
- Eat that many calories every day for 2–3 weeks, tracking as accurately as you can.
- Weigh yourself most mornings and compare weekly averages.
- Weight stable → that's your TDEE. Weight dropping ~0.5 kg/week → your TDEE is ~550 kcal higher than you're eating. Rising → it's lower.
Frequently asked questions
What does TDEE stand for?
TDEE stands for Total Daily Energy Expenditure. It is the total number of calories your body burns in 24 hours, including your resting metabolism (BMR), digesting food, everyday movement, and exercise.
Is TDEE the same as maintenance calories?
Yes. Your TDEE is your maintenance calorie level: if you eat about the same number of calories as your TDEE, your weight will stay roughly stable over time.
How accurate are TDEE calculators?
TDEE calculators give an estimate that is often within about 10% of your true value for most people, but individuals can differ by more. Use the result as a starting point, track your weight for 2–3 weeks, then adjust based on the trend.
How do I lose weight using my TDEE?
Eat below your TDEE. A moderate deficit of about 300–500 calories per day under your TDEE typically leads to roughly 0.25–0.5 kg (0.5–1 lb) of weight loss per week.
Sources
- Mifflin MD, St Jeor ST, et al. A new predictive equation for resting energy expenditure in healthy individuals (Am J Clin Nutr, 1990)
- Frankenfield D, et al. Comparison of predictive equations for resting metabolic rate in healthy adults: a systematic review (J Am Diet Assoc, 2005)
- Levine JA. Non-exercise activity thermogenesis (NEAT) (Best Pract Res Clin Endocrinol Metab, 2002)
- Westerterp KR. Diet induced thermogenesis (Nutr Metab, 2004)
- NIH / NIDDK Body Weight Planner
This article is for general education and is not medical advice. Calorie needs vary by individual and health condition. Consult a qualified healthcare professional before making significant dietary changes, especially if you are pregnant, breastfeeding, under 18, or have a medical condition. See our medical review policy and disclaimer.