TDEE Calculator
Calculate your Total Daily Energy Expenditure using the Mifflin-St Jeor equation. Get your BMR and personalized calorie targets.
Daily Calorie Targets
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What Is Total Daily Energy Expenditure (TDEE)?
Total Daily Energy Expenditure, or TDEE, represents the total number of calories your body burns in a single day. It accounts for everything from the energy required to keep your heart beating and lungs breathing to the calories burned during exercise, digestion, and even fidgeting. TDEE is widely regarded as the most important number for anyone looking to manage their weight, because it establishes the baseline against which you can plan a caloric surplus for muscle gain or a caloric deficit for fat loss.
How TDEE Is Calculated
TDEE is determined by first calculating your Basal Metabolic Rate (BMR) and then multiplying it by an activity factor. BMR represents the number of calories your body needs to perform its most basic life-sustaining functions at complete rest -- things like circulation, cell production, breathing, and maintaining body temperature. The most widely used and research-validated formula for estimating BMR is the Mifflin-St Jeor equation. For men, the formula is BMR = (10 x weight in kg) + (6.25 x height in cm) - (5 x age in years) + 5. For women, it is the same formula but with a constant of -161 instead of +5. This equation has been shown in clinical studies to be accurate within approximately 10% for most individuals, making it the preferred method over older formulas like the Harris-Benedict equation.
Activity Level Multipliers
Once you have your BMR, the next step is to account for physical activity by applying a multiplier. The standard activity levels used in TDEE calculations are: Sedentary (BMR x 1.2) for people with desk jobs and little to no exercise; Lightly Active (BMR x 1.375) for those who do light exercise one to three days per week; Moderately Active (BMR x 1.55) for moderate exercise three to five days per week; Very Active (BMR x 1.725) for hard exercise six to seven days per week; and Extra Active (BMR x 1.9) for athletes or people with physically demanding jobs combined with regular training. Selecting the right activity level is crucial for accuracy. A common mistake is overestimating exercise intensity, which leads to an inflated TDEE and can undermine weight management goals.
Quick Reference: TDEE Components
BMR accounts for roughly 60-75% of total daily calorie burn. The thermic effect of food (digesting and processing meals) uses about 10% of calories consumed. Non-exercise activity thermogenesis (NEAT), which includes walking, fidgeting, and daily chores, can vary by 200-900 calories per day between individuals. Exercise activity typically accounts for 5-30% of TDEE depending on training frequency and intensity.
Using TDEE for Weight Goals
Your TDEE is the caloric maintenance point -- eating exactly this many calories each day should keep your weight stable. To lose weight, you need to create a calorie deficit by eating fewer calories than your TDEE. A deficit of approximately 500 calories per day translates to roughly one pound of fat loss per week, since one pound of body fat stores about 3,500 calories of energy. For weight gain and muscle building, a surplus of 250-500 calories above TDEE is generally recommended, combined with a structured resistance training program. It is important not to cut calories too aggressively. Most nutrition experts recommend that women consume no fewer than 1,200 calories per day and men no fewer than 1,500 calories per day to ensure adequate nutrition. Additionally, TDEE is not a fixed number -- it can change as your weight, age, muscle mass, and activity level change, so recalculating periodically is advisable for continued progress toward your goals.