TDEE Calculator

What Is TDEE?

Total Daily Energy Expenditure, or TDEE, represents the total number of calories your body burns in a 24-hour period. It accounts for everything from keeping your heart beating and lungs breathing to walking up stairs and lifting weights. Knowing your TDEE is the foundation for any calorie-based approach to weight management: whether your goal is losing fat, building muscle, or maintaining your current physique. Enter your details in the calculator above to get a personalized TDEE estimate along with calorie targets for different goals.

The Four Components of TDEE

Your daily energy expenditure is built from four distinct components. Basal Metabolic Rate (BMR) is the largest, accounting for 60-70% of your total burn. BMR covers the energy your body needs for basic survival functions at complete rest: breathing, circulation, cell repair, brain activity, and maintaining body temperature. The thermic effect of food (TEF) uses approximately 10% of total calories to digest, absorb, and process the nutrients you eat. Exercise Activity Thermogenesis (EAT) covers structured workouts like running, weight training, or sports. Non-Exercise Activity Thermogenesis (NEAT) captures all other daily movement: walking, standing, fidgeting, typing, doing chores. Together, EAT and NEAT make up the remaining 20-30% of TDEE and represent the most variable component between individuals.

How to Calculate Your TDEE

This calculator uses the Mifflin-St Jeor equation, which research has validated as the most accurate formula for estimating BMR in the general population. The equation factors in your weight, height, age, and sex to produce a resting metabolic rate, then multiplies that number by an activity factor based on your lifestyle. A sedentary office worker gets a multiplier of 1.2, while someone who exercises intensely six days a week uses 1.725. The resulting number is your estimated TDEE: the calorie intake at which your weight would remain stable over time.

The Mifflin-St Jeor formula: for men, BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age) + 5. For women, the same formula but ending with − 161 instead of + 5. A 30-year-old man at 80 kg and 178 cm has a BMR of approximately 1,780 calories. With moderate activity (multiplier 1.55), his TDEE comes to roughly 2,760 calories per day.

Using TDEE for Weight Loss

To lose weight, you need to eat fewer calories than your TDEE: creating what is called a calorie deficit. A daily deficit of 500 calories below your TDEE leads to approximately one pound of fat loss per week. A 750-calorie deficit accelerates that to about 1.5 pounds per week. Going beyond a 1,000-calorie deficit is generally counterproductive: your body responds to aggressive restriction by lowering its metabolic rate, increasing hunger hormones, and breaking down muscle tissue for energy. A sustainable approach is a deficit of 15-25% below your TDEE, which balances meaningful fat loss with metabolic health and energy levels for daily life.

TDEE for Muscle Gain and Bulking

Building muscle requires eating above your TDEE: a calorie surplus that provides the extra energy needed for muscle protein synthesis. A modest surplus of 200-400 calories above maintenance, combined with progressive resistance training and protein intake of 0.7-1 gram per pound of body weight, supports lean muscle gain while minimizing unnecessary fat accumulation. Larger surpluses of 500+ calories lead to faster weight gain but a higher proportion of that gain will be fat. Most natural lifters can expect to gain 1-2 pounds of muscle per month under optimal conditions, so a large surplus simply accelerates fat storage without additional muscle benefit.

BMR vs TDEE: Understanding the Difference

BMR and TDEE are related but measure different things. Your basal metabolic rate is the energy cost of being alive at complete rest: lying in bed, awake, in a temperature-controlled room, having not eaten for 12 hours. TDEE takes that number and adds the energy cost of everything else you do during the day. For a sedentary person, TDEE might be only 20% above BMR. For a construction worker or competitive athlete, TDEE could be 70-100% above BMR. The distinction matters because base weight loss recommendations on TDEE, not BMR: eating below your BMR for extended periods is both unnecessary and counterproductive for most people.

Why the Activity Multiplier Matters Most

The most common source of error when calculating TDEE is selecting the wrong activity level. People tend to overestimate their activity, choosing "moderately active" when their actual daily movement puts them closer to "lightly active." A desk job with three gym sessions per week is light to moderate, not highly active. Miscategorizing your activity level by even one tier can skew your TDEE estimate by 300-500 calories per day: enough to completely stall fat loss or cause unintended weight gain. When in doubt, select the lower activity level and adjust based on real-world results over two to three weeks.

Recalculating and Adjusting Over Time

Your TDEE is not a fixed number. It changes as your weight changes, as you age, and as your activity patterns shift. Losing 15 pounds reduces your TDEE because a smaller body requires less energy to maintain. Gaining muscle increases it because muscle tissue is metabolically active even at rest. Recalculate every 10-15 pounds of weight change, or whenever you notice that your current calorie target has stopped producing the expected results. Periodic diet breaks, eating at maintenance for one to two weeks every eight to twelve weeks, can help prevent metabolic adaptation during extended dieting phases and improve long-term adherence to your nutrition plan.

From TDEE to Macros

Once you know your TDEE, the next step is splitting those calories into macronutrients: protein, carbohydrates, and fat. A solid starting point for most goals: set protein at 0.7 to 1 gram per pound of body weight, set fat at 25-30% of total calories, and allocate the remaining calories to carbohydrates. For someone with a TDEE of 2,500 calories weighing 175 pounds, that works out to roughly 150 grams of protein (600 calories), 70 grams of fat (630 calories), and 320 grams of carbs (1,270 calories). Protein stays high regardless of goal because it preserves muscle during a deficit and supports growth during a surplus. Carbs and fat ratios can flex based on personal preference, training demands, and how your body responds.

Tracking Accuracy and Common Pitfalls

The biggest gap between a calculated TDEE and real-world results usually comes from inaccurate food tracking, not a flawed formula. Studies consistently show that even nutrition-conscious individuals underestimate their calorie intake by 20-40%. Cooking oils, condiments, snacking, and liquid calories are the most common culprits. A single tablespoon of olive oil adds 120 calories, a handful of nuts adds 170, and a sugary coffee drink can add 400 without feeling like a meal. If your TDEE-based plan is not producing expected results after three weeks, audit your tracking accuracy before adjusting the calorie target. Weighing food with a kitchen scale for one week often reveals the source of the discrepancy.

Frequently asked questions