TDEE Calculator
Calculate your Total Daily Energy Expenditure
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References
- Mifflin, M.D., St Jeor, S.T., et al. "A new predictive equation for resting energy expenditure in healthy individuals." American Journal of Clinical Nutrition, 1990.
- Harris, J.A. & Benedict, F.G. "A Biometric Study of Human Basal Metabolism." Proceedings of the National Academy of Sciences, 1918.
- USDA Dietary Guidelines for Americans, 2020-2025
- Academy of Nutrition and Dietetics - Evidence Analysis Library
- National Institutes of Health (NIH) - Metabolic Rate and Energy Balance
What is TDEE (Total Daily Energy Expenditure)?
Total Daily Energy Expenditure (TDEE) is the total number of calories your body burns in a 24-hour period. It represents the complete picture of your daily energy output, encompassing everything from basic life-sustaining functions to intense exercise sessions. TDEE is the most important number for anyone looking to lose weight, gain muscle, or maintain their current physique.
Your TDEE is made up of three main components:
- 1.Basal Metabolic Rate (BMR) — The calories burned at complete rest to keep you alive (breathing, circulation, cell repair, brain function). This accounts for 60-75% of your total daily burn.
- 2.Physical Activity — Calories burned through exercise, walking, fidgeting, and all daily movement. This is the most variable component and accounts for 15-30% of your TDEE.
- 3.Thermic Effect of Food (TEF) — Calories burned digesting, absorbing, and processing nutrients. This typically accounts for ~10% of your TDEE.
Understanding your TDEE is the foundation of all effective nutrition planning. Eating at your TDEE level maintains your weight. Eating below it creates a deficit for weight loss. Eating above it creates a surplus for weight gain. Unlike BMR alone, TDEE gives you the practical, actionable number you need for real-world meal planning.
How is TDEE Calculated?
TDEE is calculated using a two-step process. First, your Basal Metabolic Rate (BMR) is determined using the Mifflin-St Jeor equation — the most accurate formula for the general population. Then, your BMR is multiplied by an activity multiplier that reflects your daily movement and exercise habits.
The TDEE Formula
TDEE = BMR × Activity Multiplier
Where BMR is calculated via Mifflin-St Jeor
Step 1: Calculate BMR using the Mifflin-St Jeor equation:
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
Step 2: Multiply by your Activity Level:
| Activity Level | Multiplier | Description |
|---|---|---|
| Sedentary | 1.2 | Desk job, little or no exercise, typical office worker |
| Lightly Active | 1.375 | Light exercise 1-3 days per week, walking, yoga |
| Moderately Active | 1.55 | Moderate exercise 3-5 days per week, jogging, gym sessions |
| Very Active | 1.725 | Hard exercise 6-7 days per week, physical job + training |
| Extra Active | 1.9 | Athlete-level training, very physical job + daily intense exercise |
Example calculation for a 30-year-old moderately active man, 80 kg, 180 cm:
BMR = (10 × 80) + (6.25 × 180) - (5 × 30) + 5 = 1,780 calories
TDEE = 1,780 × 1.55 = 2,759 calories/day
Example calculation for a 30-year-old lightly active woman, 65 kg, 165 cm:
BMR = (10 × 65) + (6.25 × 165) - (5 × 30) - 161 = 1,370 calories
TDEE = 1,370 × 1.375 = 1,884 calories/day
TDEE vs BMR: What's the Difference?
Many people confuse BMR with TDEE, but understanding the distinction is critical for effective weight management. Here's a clear comparison:
| Feature | BMR | TDEE |
|---|---|---|
| Definition | Calories burned at complete rest | Total calories burned in a full day including all activity |
| What it includes | Breathing, circulation, cell production, organ function | BMR + exercise + daily movement + digestion (TEF) |
| % of total burn | 60-75% | 100% (the complete total) |
| Always | Lower than TDEE | Higher than BMR |
| Use case | Baseline metabolic understanding | Weight loss, gain, or maintenance planning |
| Formula | Mifflin-St Jeor (fixed inputs) | BMR × Activity Multiplier |
Key takeaway: BMR tells you the minimum calories your body needs to survive. TDEE tells you how many calories you actually burn in a typical day. For any weight management goal, always base your calorie targets on your TDEE, not your BMR directly.
Quick Relationship
Your TDEE is always higher than your BMR. For a sedentary person, TDEE is about 20% above BMR. For a very active person, TDEE can be 72.5% or more above BMR. The more active you are, the larger the gap between your BMR and TDEE.
How to Use TDEE for Weight Loss
Weight loss occurs when you consistently consume fewer calories than your TDEE. This creates a calorie deficit, forcing your body to use stored energy (primarily body fat) to make up the difference.
The Calorie Deficit Math
One pound of body fat contains approximately 3,500 calories of stored energy. To lose one pound of fat per week:
Common deficit strategies and their expected results:
| Daily Deficit | Weekly Loss | Pace | Best For |
|---|---|---|---|
| 250 cal/day | ~0.5 lb per week | Very slow | Long-term maintenance, beginners |
| 500 cal/day | ~1 lb per week | Moderate | Most people, sustainable fat loss |
| 750 cal/day | ~1.5 lb per week | Fast | Higher body fat individuals |
| 1,000 cal/day | ~2 lb per week | Very fast | Short-term only, medical supervision |
Important Warning
Never eat below your BMR for extended periods. While short-term mild deficits are fine, chronically eating below your BMR can cause muscle loss, hormonal disruption, nutrient deficiencies, and significant metabolic slowdown. A moderate deficit of 300-500 calories below TDEE is the safest approach for most people.
How to Use TDEE for Weight Gain
To gain weight — particularly lean muscle mass — you need to eat in a calorie surplus, consuming more calories than your TDEE. This provides the extra energy your body needs to build new muscle tissue.
Lean Bulking Strategy
For controlled, quality weight gain (maximizing muscle while minimizing fat), aim for a modest surplus of 200-400 calories above your TDEE:
Target Calories = TDEE + 200 to 400
This yields approximately 0.5-1 lb of weight gain per week, with the majority being lean muscle when combined with proper training.
Key Principles for Quality Weight Gain
- •Train with progressive overload: Without resistance training stimulus, excess calories are stored primarily as fat.
- •Eat adequate protein: Aim for 0.7-1g of protein per pound of body weight daily to support muscle synthesis.
- •Minimize a "dirty bulk": Gaining more than 0.5-1 lb per week typically results in excess fat accumulation.
- •Be patient: Building quality muscle is a slow process — expect to gain 1-2 lbs of muscle per month even under optimal conditions.
How to Maintain Your Current Weight
Weight maintenance is the simplest application of TDEE: eat at your maintenance calories to stay the same weight. Your TDEE is your maintenance calorie level.
Eat at TDEE = Maintain Current Weight
Practical tips for weight maintenance:
- •Monitor trends, not daily fluctuations: Weight naturally fluctuates 2-5 lbs day to day due to water, food volume, and sodium. Track weekly averages instead.
- •Recalculate TDEE as you change: If your weight, muscle mass, or activity level changes significantly, your TDEE shifts. Recalculate every 10-15 lbs of weight change.
- •Allow for flexibility: You don't need to hit your TDEE exactly every day. Eating within a range of ±200 calories of maintenance on average is sufficient for weight stability.
- •Prioritize nutrient quality: While calories determine weight, nutrient-dense foods support overall health, energy, and satiety at maintenance.
Factors That Affect Your TDEE
Your TDEE is not a static number — it changes based on multiple biological and lifestyle factors:
1. Age
BMR naturally declines by approximately 1-2% per decade after age 20, primarily due to gradual muscle loss (sarcopenia). This means your TDEE decreases with age even if your activity level stays the same. A 50-year-old will burn fewer calories at rest than a 20-year-old of the same weight.
2. Biological Sex
Men typically have a 5-10% higher BMR (and therefore higher TDEE) than women of the same weight and height. This is due to men naturally carrying more lean muscle mass and less essential body fat. The Mifflin-St Jeor equation accounts for this difference.
3. Body Weight
Heavier individuals burn more calories because it requires more energy to move and maintain a larger body. This is why TDEE calculators require weight as an input — it is one of the strongest predictors of daily energy expenditure.
4. Height
Taller individuals tend to have slightly higher BMRs due to greater lean body mass and surface area. Height is a secondary factor in the Mifflin-St Jeor equation, contributing less than weight but still meaningful.
5. Activity Level
This is the most variable and controllable factor. Physical activity can increase TDEE by 20-90% above BMR. Exercise type, intensity, duration, and frequency all influence the activity multiplier. A desk worker and an athlete of the same weight can have TDEEs that differ by 1,000+ calories.
6. Muscle Mass
Muscle tissue is metabolically active — it burns approximately 6-7 calories per pound per day at rest, compared to fat which burns only about 2 calories per pound. Two people who weigh the same can have significantly different TDEEs based on their body composition. This is why strength training is the most effective long-term strategy for increasing metabolic rate.
7. Metabolism and Hormones
Individual metabolic rates can vary by up to 20% from population averages due to genetics, thyroid function, and hormonal balance. Conditions like hypothyroidism can lower TDEE by 20-30%, while hyperthyroidism can increase it significantly.
Common TDEE Myths Debunked
Myth: "Eating below my TDEE will always make me lose weight"
Eating below TDEE creates a deficit, but your body adapts. Adaptive thermogenesis can reduce your metabolic rate by 10-15% during prolonged dieting, slowing weight loss. This is why periodic diet breaks and recalculation of TDEE are important for continued progress. Additionally, if your deficit is too severe, you risk losing muscle mass, which further reduces TDEE.
Myth: "My TDEE stays the same forever"
Your TDEE changes constantly. As you lose weight, your TDEE decreases because a smaller body requires fewer calories. Gaining muscle increases TDEE. Aging, hormonal changes, stress, sleep quality, and activity level all shift your TDEE over time. This is why recalculating every few months or after significant weight changes is essential.
Myth: "Cardio is the best way to increase TDEE"
While cardio burns calories during the session, strength training is more effective for long-term TDEE increases. Building muscle raises your BMR permanently — every additional pound of muscle burns ~6-7 extra calories per day at rest. Over months and years, this muscle-based increase far exceeds the temporary calorie burn from cardio sessions.
Myth: "TDEE calculators are accurate to the exact calorie"
TDEE calculators provide estimates based on population averages, with a margin of error of approximately ±100-200 calories. Individual metabolism, genetics, NEAT (non-exercise activity thermogenesis), and other factors cause real TDEE to vary from calculated values. Use the calculator as a starting point, then adjust based on actual weight trends over 2-3 weeks.
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For a complete nutrition and fitness plan, combine your TDEE with these related tools:
Last reviewed: July 16, 2026
Medical Disclaimer: This calculator is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. TDEE calculations provide estimates based on population averages and may not reflect individual metabolic rates. Always consult your physician or qualified health provider with any questions regarding your health, especially before making significant changes to your diet or exercise routine.