Calories burned in a day equals your Total Daily Energy Expenditure (TDEE). This is the foundation for weight management.
Components of daily calorie burn
| Component | Percentage | Details |
|---|---|---|
| BMR | 60–70% | Basal metabolic rate at rest |
| TEF | ~10% | Thermic effect of food |
| Exercise activity | 10–20% | Gym, sports, structured movement |
| Non-exercise activity | 15–20% | Fidgeting, walking, daily tasks |
Calories burned while sleeping
You burn ~70% of daily calories while sleeping. Your brain, heart, lungs, and organs never stop. A 70 kg person might burn 1,200–1,500 calories overnight depending on BMR.
Use our BMR calculator to get your exact resting burn rate.
Factoring activity into daily burn
Activity multipliers:
| Level | Multiplier | Burn example (70kg) |
|---|---|---|
| Sedentary | 1.2 | ~1,700–2,200 calories |
| Lightly active | 1.375 | ~1,900–2,400 calories |
| Moderately active | 1.55 | ~2,100–2,700 calories |
| Very active | 1.725 | ~2,400–2,900 calories |
| Extra active | 1.9 | ~2,600–3,200 calories |
Boosting your daily calorie burn
- Build muscle: Each kg adds 15–25 calories to BMR
- Increase NEAT: Walk more, fidget, stand while working
- Exercise: Adds 200–800 calories depending on type/intensity
- Consistency: Habitual activity creates lasting increases
How to measure your actual calorie burn
Options:
- TDEE calculator (most accessible)
- Luxury fitness trackers (inaccurate for most)
- Indirect calorimetry (gold standard, expensive)
- Track weight changes over 2–3 weeks to calibrate
Daily calorie burn decreases with age
Metabolism slows ~2–5% per decade after 25. Reasons:
- Muscle loss without resistance training
- Hormonal changes
- Reduced organ mass
Recalculate your maintenance calories every few years.