TDEE Calculator
Estimate how many calories you may burn during an average day based on your age, sex, height, weight, and activity level.
What Does This Number Mean?
What Is TDEE?
TDEE stands for Total Daily Energy Expenditure. It is an estimate of the total amount of energy your body uses during an average day.
Your body uses energy even when you are resting. Additional energy is used through physical activity and normal daily movement.
A TDEE calculator combines an estimate of resting energy expenditure with an activity multiplier to provide a practical estimate of total daily calorie expenditure.
How Is TDEE Calculated?
This calculator first estimates your basal or resting energy needs using the Mifflin–St Jeor equation.
It then multiplies that result by the activity factor you select.
Step 1 — Estimate BMR
BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age) + 5
BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age) − 161
Step 2 — Estimate TDEE
What Is the Difference Between BMR and TDEE?
Basal Metabolic Rate
An estimate of the calories your body uses to support essential functions while at rest.
Total Daily Energy Expenditure
An estimate of total daily energy expenditure after activity is considered.
Understanding TDEE Activity Levels
Activity multipliers are convenient approximations. They cannot perfectly describe the enormous differences in daily movement between individuals.
| Activity Level | Multiplier | General Description |
|---|---|---|
| Sedentary | 1.20 | Little structured exercise and relatively low overall activity. |
| Lightly Active | 1.375 | Light exercise approximately 1–3 days per week. |
| Moderately Active | 1.55 | Moderate exercise approximately 3–5 days per week. |
| Very Active | 1.725 | Hard exercise or high activity on most days. |
| Extra Active | 1.90 | Very demanding exercise, highly physical work, or unusually high daily activity. |
These multipliers are practical estimation conventions. They should not be interpreted as laboratory measurements of your physical activity.
TDEE Calculation Example
Consider a 55-year-old man who weighs 75 kg, is 170 cm tall, and selects the moderately active multiplier of 1.55.
BMR = (10 × 75) + (6.25 × 170) − (5 × 55) + 5
BMR ≈ 1,543 calories/day
Step 2 — Apply activity multiplier1,542.5 × 1.55
≈ 2,391 calories/day
What Contributes to Daily Energy Expenditure?
Total daily energy expenditure is influenced by several components rather than exercise alone.
Resting Energy
Energy used to support essential body functions even when you are resting.
Exercise
Energy used during intentional physical activities such as walking, cycling, strength training, or running.
Everyday Movement
Walking around the house, standing, household tasks, work, and other nonexercise movement also use energy.
Food Processing
Digestion and processing of food also require some energy.
TDEE After Age 50
Energy needs can change with age, but age alone does not determine how many calories someone requires.
Body size, muscle mass, activity, occupation, exercise, health, medications, appetite, and individual metabolism can all affect real-world energy needs.
Maintaining regular physical activity and preserving physical function can be important considerations as people get older, but a calculated calorie number should still be treated as a starting estimate rather than an exact prescription.
Is TDEE the Same as Maintenance Calories?
TDEE is often used as an estimate of maintenance calorie needs because, in theory, energy intake similar to energy expenditure would tend to support relatively stable body energy stores over time.
In practice, however, calorie calculations are imperfect. Food-label estimates, portion sizes, activity, metabolism, and the prediction formula itself can all introduce error.
Your actual body-weight trend over several weeks can provide useful real-world information about whether a calorie estimate is close to your true maintenance needs.
Can TDEE Be Used for Weight Management?
TDEE can provide a starting reference when thinking about energy balance, but it should not be treated as a guaranteed weight-loss or weight-gain formula.
Body weight changes dynamically as calorie intake and expenditure change. The body can also adapt over time, which is one reason simple fixed-calorie rules can become inaccurate during prolonged weight change.
A more individualized approach may be appropriate when significant weight loss, weight gain, illness, frailty, or medical nutrition therapy is involved.
Why Your Actual Calorie Needs May Differ
Two people with similar age, height, and body weight can still have different real-world energy expenditure.
- Body composition: differences in lean and fat tissue can affect energy needs.
- Daily movement: some people naturally stand, walk, and move more throughout the day.
- Exercise: training duration and intensity vary widely.
- Occupation: desk work and physically demanding jobs can create very different energy demands.
- Health: illness and some medical conditions may alter energy needs.
- Medications: some medications can affect appetite, body weight, or energy expenditure.
- Measurement error: reported food intake and activity are rarely measured with perfect accuracy.
How Should You Choose Your Activity Level?
Choose the level that most closely represents your usual weekly lifestyle rather than your most active day.
Consider Your Work
Think about whether most of your day is seated, standing, walking, or physically demanding.
Consider Exercise
Include how often, how long, and how intensely you normally exercise.
Think About Daily Movement
Household work, walking, errands, and other movement outside formal exercise also matter.
Avoid Overestimating
If you are between two categories, choosing the more conservative category can provide a useful starting point.
Should You Eat Your BMR or Your TDEE?
BMR and TDEE are estimates of different things and neither should automatically be interpreted as a personalized calorie prescription.
BMR represents estimated resting energy requirements, whereas TDEE attempts to account for an average day's activity.
Individual calorie planning should also consider nutritional adequacy, medical conditions, body-weight goals, physical activity, and real-world progress.
How to Use Your TDEE Estimate
Enter Accurate Measurements
Use your current age, height, weight, and sex.
Choose Activity Carefully
Select the activity category that most closely represents your typical lifestyle.
Treat the Result as a Starting Point
Do not assume the calculated number exactly matches your real daily expenditure.
Watch Real-World Trends
Body-weight trends, energy, appetite, exercise performance, and health can help provide additional context.
BMR, TDEE, and Calorie Intake Are Different
| Term | Meaning |
|---|---|
| BMR | Estimated energy used for essential functions at rest. |
| TDEE | Estimated total energy expenditure over an average day. |
| Calorie Intake | Energy consumed through foods and beverages. |
Frequently Asked Questions
TDEE stands for Total Daily Energy Expenditure. It refers to estimated total energy use during an average day.
No. BMR estimates resting energy needs. TDEE attempts to estimate total daily expenditure after activity is considered.
Not necessarily. TDEE is an estimate of expenditure, not an individualized nutrition prescription. Actual calorie needs and appropriate intake can differ.
It provides a mathematical estimate. Prediction equations and broad activity categories cannot directly measure an individual's total energy expenditure.
Energy needs can change with age, but the amount varies between individuals. Changes in body composition, activity, health, and lifestyle can all contribute.
Choose the category that best reflects your usual combination of work, exercise, and daily movement. Avoid basing the choice on one unusually active day.
Yes. Daily expenditure can vary because your walking, exercise, work, household activity, and other movement are not identical every day. The calculator is intended to estimate an average rather than a precise daily value.
It can be useful to recalculate after a meaningful change in body weight or activity because those inputs affect the estimate.
