BMR vs TDEE
BMR and TDEE are two calorie estimates that work together. BMR tells you how many calories your body burns at complete rest; TDEE adds your activity level to give you your real daily calorie burn. Together they form the foundation of any evidence-based nutrition plan.
BMR (Basal Metabolic Rate)
BMR is the number of calories your body needs to maintain basic life functions — breathing, circulation, cell repair — while at complete rest for 24 hours. It is the minimum energy your body requires to survive.
BMR = 10W + 6.25H - 5A + S (Mifflin-St Jeor)- •Calories burned at complete rest (no movement)
- •Accounts for ~60–70% of total daily calorie burn
- •Influenced by age, sex, height, and weight
- •Calculated using Mifflin-St Jeor or Harris-Benedict
- •Does NOT include any physical activity
TDEE (Total Daily Energy Expenditure)
TDEE is the total number of calories you burn in a day, including BMR plus all physical activity — exercise, work, and even walking to the kitchen. It is your true daily calorie maintenance number.
TDEE = BMR × Activity Multiplier- •BMR multiplied by an activity factor
- •Represents actual calories burned per day
- •Changes based on your lifestyle and exercise level
- •Activity multipliers range from 1.2 (sedentary) to 1.9 (very active)
- •The number to use for setting calorie goals
Key Differences
| Aspect | BMR (Basal Metabolic Rate) | TDEE (Total Daily Energy Expenditure) |
|---|---|---|
| What It Measures | Resting calorie burn only | Total daily calorie burn |
| Activity Included | No | Yes (via multiplier) |
| Typical Value (avg adult) | 1,400–1,800 kcal/day | 1,800–2,600 kcal/day |
| Use Case | Starting point for calculation | Setting actual calorie goals |
| Changes With Exercise | Slightly (more muscle = higher BMR) | Significantly |
| Sedentary Multiplier | N/A (BMR is the base) | BMR × 1.2 |
When to Use Each
Calculate your BMR first to understand your metabolic baseline. Then calculate your TDEE using your activity level — this is the number you eat at to maintain weight. To lose weight, eat 300–500 calories below your TDEE; to gain, eat 250–500 above it.
Frequently Asked Questions
Should I eat my BMR or my TDEE?
You should eat based on your TDEE, not your BMR. Eating at your BMR means consuming only enough calories for survival at rest — this is too low for most people with any daily activity and can cause muscle loss and nutritional deficiencies. Your TDEE is your actual maintenance calorie number.
How much higher is TDEE than BMR?
For a sedentary person, TDEE is about 20% higher than BMR (multiplier of 1.2). For a moderately active person (3–5 workouts per week), TDEE is roughly 55% higher than BMR (multiplier of 1.55). Athletes can have TDEEs nearly double their BMR.
Does muscle mass affect BMR?
Yes. Muscle tissue is metabolically active and burns more calories at rest than fat tissue. For every kilogram of muscle gained, BMR increases by roughly 13–20 calories per day. This is why strength training is recommended for long-term weight management.