Estimate your Total Daily Energy Expenditure using age, sex, height, weight, and activity level to understand approximately how many calories your body uses daily.
TDEE = Basal metabolic rate × Activity factorThe calculator applies the selected body, age, activity and goal assumptions to a standard planning equation. Actual needs vary with health status, climate, training, medication, food measurement and changes in body weight or activity.
A TDEE Calculator provides a ballpark estimate of your Total Daily Energy Expenditure, the approximate number of calories your body uses on any given day. It factors in an estimated calculation of your basal metabolic rate (BMR) and your average activity level. By plugging in your age, sex, height, weight and activity level, it can give you an estimate of how many calories you'll burn on a daily basis. Results can give you a very useful estimate, though they are just estimates, and actual energy needs vary due to factors such as body composition, activity patterns, physiology, measurement error, and individual differences.
Enter accurate information into the TDEE Calculator and select the activity level that most closely reflects your usual routine. Small differences in your inputs or activity selection can change the estimated daily calorie expenditure.
After entering the required information, calculate your TDEE. The result is generally expressed as estimated calories burned per day, commonly written as kcal/day.
A TDEE Calculator usually has two steps. The first step is calculating your basal metabolic rate. The second step is multiplying your basal metabolic rate by a multiplier based on your activity level.
A commonly used approach for estimating BMR in adults is the Mifflin-St Jeor equation. The estimated BMR is then multiplied by an activity factor corresponding to the selected activity category.
The general relationship is:
TDEE = BMR × Activity Factor
BMR represents estimated resting energy expenditure, while the activity factor attempts to account for differences in overall daily activity.
When the Mifflin-St Jeor equation is used, BMR is estimated as follows:
For men:
BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age in years) + 5
For women:
BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age in years) − 161
After estimating BMR:
TDEE = BMR × Activity Factor
The variables are:
Commonly used activity multipliers include approximately 1.2 for sedentary activity, 1.375 for light activity, 1.55 for moderate activity, 1.725 for very active routines, and 1.9 for exceptionally high activity. Activity-category definitions can vary between calculators, so select the category according to the descriptions provided with the tool.
Consider a 30-year-old man who weighs 80 kg, is 180 cm tall, and selects an activity factor of 1.55.
First, estimate BMR using the Mifflin-St Jeor equation:
BMR = (10 × 80) + (6.25 × 180) − (5 × 30) + 5
BMR = 800 + 1,125 − 150 + 5 = 1,780 calories/day
Next, multiply the estimated BMR by the activity factor:
TDEE = 1,780 × 1.55
TDEE = 2,759 calories/day
The estimated Total Daily Energy Expenditure is therefore approximately 2,759 calories per day. This represents a calculated estimate of average daily energy expenditure based on the entered characteristics and selected activity level. It should not be interpreted as a precise measurement of calories burned every day.
Your TDEE result represents an estimate of the total energy your body may use during an average day. It includes estimated resting energy expenditure plus energy associated with daily activity.
For many adults, estimated TDEE can be used as a starting point when considering approximate maintenance calorie needs. In simplified terms, consuming energy close to actual energy expenditure over time tends to support weight maintenance, but real-world body-weight changes are influenced by multiple factors and do not necessarily follow calculator estimates precisely.
It is also important to distinguish TDEE from BMR. BMR estimates energy expenditure under resting conditions, whereas TDEE attempts to account for activity and therefore is generally higher.
A TDEE estimate should not be interpreted as a fixed daily calorie requirement. Physical activity can vary substantially from one day to another, and the activity multiplier simplifies a complex and changing component of energy expenditure.
Activity selection can have a substantial effect on the TDEE estimate. Choosing a category that overstates or understates your usual activity can produce a noticeably different result. Consider your typical routine rather than your most active day.
People of the same age, height, and weight can have different body compositions and energy expenditures. Standard TDEE equations generally do not directly measure lean mass, fat mass, or metabolic differences between individuals.
Age is included in commonly used BMR equations and affects the resulting estimate. Enter your actual age rather than an approximate age range.
Incorrect height or weight measurements directly affect the BMR calculation and therefore the final TDEE estimate. Check units carefully, particularly when converting between pounds and kilograms or inches and centimeters.
Exercise duration, exercise intensity, occupational activity, walking, household activity, and other movement can vary from day to day. A single activity multiplier cannot capture every change in daily energy expenditure.
Predictive equations estimate energy expenditure from population-based relationships. Two people with similar calculator inputs may still have different actual energy requirements.
The TDEE Calculator provides an estimate rather than a direct measurement of metabolism or energy expenditure. It cannot determine exactly how many calories an individual burns each day.
Pregnancy, growth, certain medical conditions, medications, athletic training, recovery from illness, and other circumstances may involve energy needs that are not adequately represented by a general adult TDEE estimate. Personalized nutrition or medical decisions should be discussed with an appropriately qualified healthcare professional when relevant.
TDEE stands for Total Daily Energy Expenditure. It is an estimate of the total amount of energy your body uses during a day, including estimated resting energy expenditure and energy associated with physical activity.
BMR estimates the energy used for basic physiological functions at rest. TDEE builds on the BMR estimate by applying an activity factor intended to represent additional energy expenditure from everyday activity and exercise.
A TDEE Calculator provides a useful estimate, but it cannot directly measure an individual's daily energy expenditure. Accuracy depends on the predictive equation, input measurements, activity selection, body composition, and individual variation.
Select the activity category that most closely reflects your typical overall routine. Consider structured exercise as well as occupational and everyday movement. Avoid choosing a category based solely on an unusually active day or occasional workout.
Body weight is a variable in commonly used BMR equations. Because estimated BMR contributes to the TDEE calculation, changing the weight input can change the resulting daily energy-expenditure estimate.
TDEE is commonly used as an estimate of the energy intake associated with weight maintenance when energy intake and actual expenditure are balanced over time. However, calculated TDEE and an individual's actual maintenance intake may differ.
Use current measurements and a realistic activity level. Follow the estimate consistently, monitor results over time and adjust only after comparing actual progress, hunger, performance and professional guidance.
The BMR calculates the calories that the body needs to function at rest (breathing, circulation, body temperature, etc.). TDEE accounts for activity by adding an activity factor.
Choice ofactivitylevel can dramatically change the estimatedTDEE output; a sedentarY individual might report a day’s output much less than an active one or someone on the other side of the spectrum such as an construction employee. You need the best reflection regarding you're routine over week rather then of day in month with maximum task level.
A good time to consider recomputing our TDEE for you is when there is a sudden and considerable shift in our body weight, amount of training performed each week, type of work or daily lifestyle activity. Even our energy needs might shift if the age or the structure of our body or lifestyle change.
Yes. Actual daily energy expenditure can vary depending on exercise, walking, work activity, sleep, movement, and other factors. A TDEE Calculator provides an estimated average rather than an exact number of calories burned every day.
Using your estimated TDEE may be a useful guide for an approximate estimate of daily energy requirements, but should not be regarded as an exact number. Factors affecting energy requirements that are not fully taken into account in the calculation include activity levels, body composition, health factors etc.
Important: This calculator is intended for informational purposes only. It does not diagnose health conditions or replace personalized medical or nutritional guidance from a qualified healthcare professional.