TDEE Calculator

Free TDEE Calculator - Find Your Total Daily Energy Expenditure

TDEE stands for Total Daily Energy Expenditure. In plain words, it's the real number of calories your body burns in a full day — not just lying in bed, but walking, working, exercising, digesting food, and everything else you do between waking up and going back to sleep. This TDEE calculator works it out in seconds using your age, gender, weight, height, and activity level, then goes further by turning that number into a goal-based calorie target for losing weight, gaining weight, or staying exactly where you are.

Most people search for a TDEE calculator because they're starting a diet, planning a bulk, or just tired of guessing how much they should eat. This tool skips the guesswork. Type in your stats, pick how active you really are, choose a goal, and you get a calorie number you can actually use today, along with a full macro split of protein, carbs, and fat so you know not just how much to eat, but what to eat it as. No signup, no app download, no paywall.

What Does TDEE Actually Mean?

Think of TDEE as your body's total daily calorie budget. It's built from four parts. The biggest chunk, usually 60-75% of the total, is your BMR — the calories burned just staying alive. Next is the thermic effect of food, the energy your body spends digesting what you eat, which is usually around 10%. Then there's exercise activity, the calories burned during intentional workouts. And finally there's NEAT — Non-Exercise Activity Thermogenesis — which covers everything else: walking to the kitchen, typing, fidgeting, standing up, even talking with your hands.

Add all four pieces together and you get TDEE, the single number that decides whether you gain, lose, or hold your weight steady. This calculator estimates it the standard way — calculate BMR first, then multiply by an activity factor that accounts for exercise and daily movement together.

How This TDEE Calculator Works

The calculation happens in two clean steps. First, your BMR is calculated using the Mifflin-St Jeor equation, the formula most dietitians and trainers trust today. For men: BMR = 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5. For women, the formula is the same except you subtract 161 instead of adding 5.

Second, that BMR gets multiplied by an activity multiplier based on how active you told us you are. A sedentary person multiplies by 1.2, while someone training hard six or seven days a week multiplies by close to 1.9. That final number is your TDEE — your true maintenance calories. If you enter your body fat percentage, the calculator can also lean on the Katch-McArdle formula behind the scenes, which uses lean body mass instead of total weight and tends to be more accurate for lean or muscular people.

Choosing Your Activity Level Correctly

This is the step where most people get their TDEE wrong, usually by overestimating. Be honest here, because picking too high an activity level is the single biggest reason people 'eat their maintenance calories' but still gain weight.

• Sedentary: a desk job, little or no structured exercise, mostly sitting all day.
• Lightly active: light exercise or sports 1-3 days a week, otherwise a normal desk-bound day.
• Moderately active: moderate exercise or sports 3-5 days a week.
• Very active: hard exercise or sports 6-7 days a week.
• Extremely active: very hard daily training, a physically demanding job, or both combined — this level is rarely accurate for the average gym-goer.

TDEE for Weight Loss: Setting a Real Deficit

To lose weight, you need to eat below your TDEE, creating a calorie deficit. This calculator offers three deficit strengths — mild (about 10% below TDEE), moderate (about 15%), and fast (about 20%) — and shows you the expected weekly weight loss for each using the standard estimate that roughly 7700 kcal equals about 1 kg of body fat (around 3500 kcal per pound).

A mild to moderate deficit is usually the smarter long-term choice. Aggressive deficits can drop weight faster on the scale, but they raise the risk of muscle loss, constant hunger, low energy, and eventually giving up on the plan altogether. A slower, steadier deficit is easier to stick with for months, and consistency is what actually produces results — not how sharp the deficit looks on day one.

TDEE for Muscle Gain: Setting a Smart Surplus

To gain weight or build muscle, you eat above TDEE, creating a calorie surplus. This calculator gives you a mild surplus (about 10% above TDEE) and a moderate surplus (about 15%) as options. A smaller surplus generally means a better ratio of muscle gained to fat gained, especially if you're already training with resistance exercise and eating enough protein.

A huge surplus doesn't build muscle any faster past a certain point — your body can only build a limited amount of new muscle tissue per week regardless of how much extra you eat, and additional calories beyond that point are mostly stored as fat. A controlled surplus paired with a solid protein intake and a consistent training program is the more efficient route for most people.

Understanding Your Macro Split

Total calories decide whether you lose, gain, or maintain weight, but the split between protein, carbs, and fat — your macros — shapes how you feel, perform, and hold onto muscle while you do it. This calculator offers three ready-made splits: Balanced, for a general everyday approach; High Protein, useful during a cut to help preserve muscle while calories are lower; and Low Carb, for people who prefer fewer carbohydrates and more fat in their day.

Protein is calculated at 4 calories per gram, carbs at 4 calories per gram, and fat at 9 calories per gram — the same conversion nutrition labels use. Whichever split you choose, protein intake matters most for preserving muscle, especially during a calorie deficit, so the High Protein option is worth trying if weight loss with muscle retention is the main goal.

TDEE vs BMR vs Calorie Deficit: Clearing Up the Confusion

These terms get mixed up constantly. BMR is the calorie floor — what you'd burn doing absolutely nothing all day. TDEE is BMR plus everything else you do, and it's the number that actually reflects your real daily calorie burn. A calorie deficit or surplus isn't a separate measurement at all — it's simply eating below or above your TDEE on purpose, by a set amount, to move your weight in a chosen direction.

In short: BMR tells you the minimum, TDEE tells you the real total, and your goal (lose, gain, or maintain) decides how far above or below TDEE you actually eat.

Why Your TDEE Number Might Need Adjusting Over Time

TDEE isn't fixed forever. As you lose weight, your TDEE drops too, because a smaller body needs fewer calories to run and to move around. As you gain weight or build muscle, TDEE rises for the same reason in reverse. That's why this calculator is something worth revisiting every few weeks during an active diet or bulk, rather than calculating it once and eating that same number for months.

A good rule of thumb: recheck your numbers here every time your weight shifts by about 4-5 kg (roughly 8-10 lb), or if your actual weight trend on the scale stops matching what the calculator predicted for two or three weeks in a row.

Common Mistakes When Using a TDEE Calculator

A handful of mistakes come up again and again with TDEE numbers, and knowing them ahead of time saves weeks of frustration.

• Picking too high an activity level — most people overestimate how active they actually are.
• Chasing an aggressive deficit or surplus right away instead of starting mild and adjusting based on results.
• Not tracking actual food intake, so the 'target calories' number never gets tested against real eating habits.
• Ignoring the scale trend for 2-3 weeks and adjusting too early based on daily weight swings, which are mostly water and food weight, not fat.
• Forgetting that TDEE is a smart estimate, not a lab-measured fact — real-world results should always be the final judge, with this number as the starting point.

How Accurate Is This TDEE Calculator?

The Mifflin-St Jeor formula used here has been tested against lab measurements in multiple studies and generally lands within about 10% of measured resting metabolic rate for most people, which is solid for a free, instant estimate. The activity multiplier step adds another layer of estimation, since no formula can perfectly capture how active any one person really is day to day.

For almost everyone, that combined accuracy is good enough to build a real nutrition plan around. Treat the number as a strong, evidence-based starting point — then let two to three weeks of real results (weight trend, energy levels, hunger) tell you whether to nudge the calorie target up or down slightly.

Who Should Use This TDEE Calculator

This tool is built for anyone who wants a real number to plan around instead of a rough guess — someone starting their first cut or bulk, a lifter dialing in calories before a competition, a coach setting a client's baseline, or anyone simply curious how many calories they actually burn in a day. It's not a substitute for medical advice: pregnant or breastfeeding individuals, people under 18, and anyone with a diagnosed metabolic, thyroid, or eating-related condition should get individualized numbers from a doctor or registered dietitian rather than relying on standard adult formulas like the ones used here.