Calculate your Total Daily Energy Expenditure based on your BMR and activity level.
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Total Daily Energy Expenditure (TDEE) is the total number of calories you burn in a full day, combining your BMR with all activity — exercise, walking, even fidgeting. Knowing your TDEE is the single most useful number for planning nutrition goals, since eating below it leads to weight loss, eating at it maintains weight, and eating above it leads to weight gain. TDEE combines BMR (energy at complete rest), the thermic effect of food (energy spent digesting), non-exercise activity thermogenesis or NEAT (walking, standing, fidgeting), and intentional exercise. Surprisingly, NEAT can exceed deliberate workout calories for people with active jobs but minimal formal exercise, which is why total daily movement often matters more for overall energy balance than the gym session alone. Because TDEE combines several separately-estimated components (BMR, activity level, food's thermic effect), each with its own margin of error, the final number is best treated as a well-informed starting estimate to be refined through a few weeks of real-world weight tracking rather than a precise, unchangeable figure from day one.
Total Daily Energy Expenditure represents the complete picture of daily calorie burn — combining Basal Metabolic Rate (energy needed at complete rest), the thermic effect of food (energy spent digesting what's eaten), and all physical activity, from deliberate exercise down to fidgeting and posture maintenance, a component researchers call NEAT (non-exercise activity thermogenesis) that varies surprisingly widely between individuals and can meaningfully affect total daily burn even between two people of similar size and exercise habits.
This calculator estimates TDEE by calculating BMR using the Mifflin-St Jeor equation, then applying an activity multiplier that scales from roughly 1.2 for sedentary lifestyles up to 1.9 or higher for very physically demanding jobs combined with intense training — the same general multiplier structure used across most reputable TDEE calculators, though the exact multiplier values vary somewhat between different published versions of the scale.
TDEE is the essential reference point for any calorie-based goal: eating at TDEE maintains current weight, eating below it creates the deficit needed for fat loss, and eating above it creates the surplus needed for weight or muscle gain — which is why virtually every calorie or macro calculator, including several others on this site, ultimately builds on a TDEE estimate as its foundation.
The biggest practical limitation of any TDEE formula is that it estimates a population average, not a specific individual's actual metabolism, which can vary from the formula's prediction by 10% or more in either direction due to genetics, muscle mass, thyroid function, and other factors that simple equations can't capture. This is why nutrition coaches consistently recommend treating a calculated TDEE as a starting hypothesis to be tested and adjusted: track weight and food intake consistently for two to three weeks, compare actual results against the prediction, and adjust the calorie target up or down based on what the body actually does — real tracked data will always outperform a formula's prediction for any specific individual.
BMR is calories at complete rest; TDEE adds your daily movement and exercise on top of that baseline.
Yes — body size, muscle mass, age, sex, and even genetics all affect BMR and therefore TDEE, so identical routines can still produce meaningfully different total energy needs between two people.
Be honest and moderate — most people overestimate their activity level, which leads to inaccurate calorie targets.