Bassam Mallick
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TDEE Calculator

How many calories do you burn in a day?

Your TDEE — Total Daily Energy Expenditure — is the foundation of every diet plan. Built around four formulas, a two-axis activity model, and the adaptive-thermogenesis curve no generic calculator includes.

Units

Resistance training, jogging

Your maintenance calories

What you'd eat to hold steady at today's weight

Medium confidence
2,345
kcal/day± 211

Mifflin–St Jeor BMR · TEF + NEAT + EAT layered on top

BMR
1,618
Basal metabolism
TEF
162
Digesting food
NEAT
324
Daily movement
EAT
243
Workouts

Calorie targets

Tap a card to set as active goal

Macronutrient targets

DAILY2,345kcal
Protein
126g· 21%
504 kcal42 g / meal
Carbs
302g· 52%
1208 kcal101 g / meal
Fat
70g· 27%
633 kcal23 g / meal

BMR formula comparison

Adjusted ×1.00

What if you moved more?

NEAT swings TDEE by ~600 kcal

Foundations

What TDEE actually measures

Total Daily Energy Expenditure (TDEE) is the sum of every calorie your body burns in 24 hours. It has four moving parts — and three of them are larger than the one most people focus on:

65%
BMR
Just being alive
10%
TEF
Digesting food
15%
NEAT
Daily movement
10%
EAT
Workouts

Typical breakdown of TDEE in a non-athlete adult. Athletes shift more into EAT; the elderly shift more into BMR.

Workouts only account for 5–15% of TDEE in most non-athletes. The 80–90% you don't think about (BMR + NEAT + TEF) is where energy balance is actually won or lost.

Reading your result

The four pillars in your number

  • BMR — what you'd burn lying still all day. Calculated from sex, weight, height and age. Mifflin–St Jeor (1990) is the current best-validated equation against indirect calorimetry.
  • TEF — the energy cost of digestion. About 10% of total intake. Higher with protein-heavy meals (20–30% of protein kcal vs ~5% for fat). Don't game it — just hit your protein.
  • NEAT — everything you do that isn't exercise. Walking, fidgeting, standing, gesticulating. Levine (2005) showed NEAT varies by up to 2,000 kcal/day between people of identical weight. Step count is its best single proxy.
  • EAT — formal workouts. Smaller than people think. A 60-minute resistance session burns roughly 300–450 kcal — about one banana and a tablespoon of peanut butter.

Why static calculators fail

Why your calculated TDEE is probably wrong

Static calculators give you a starting estimate, not an answer. Four forces drive the actual number 200–700 kcal away from what any formula predicts:

  1. Under-reporting your intake.Research consistently finds people under-log by ~400–600 kcal/day even when motivated to be accurate. Cooking oils, condiments, and "bites & tastes" are invisible.
  2. NEAT suppression during a cut. Eat less and your body unconsciously fidgets less, walks slower, stands less. NEAT can drop 300–600 kcal in a deficit — bigger than most workouts add.
  3. Adaptive thermogenesis. After 8–12 weeks of cutting, RMR drops 10–15% beyond what weight loss alone would predict. This is why diet breaks matter.
  4. Activity self-classification inflation. Most people who pick "Moderately Active" are sedentary by step count. We solve this by asking about steps and exercise separately.

Expect to adjust your calorie target by ±15% within 4 weeks based on how your weight actually moves. The number is a hypothesis. Your weight trend is the answer.

Indian-specific guidance

South Asian metabolism runs ~5% lower

The Mifflin–St Jeor and Harris–Benedict reference populations were predominantly European. Studies from Henry (2005) and the ICMR-NIN 2020 dietary guidelines find that native South Asian RMR runs roughly 5% below what those equations predict — partly due to body composition (lower lean mass for height) and partly due to genuine metabolic differences.

If you're of South Asian descent, toggle the South Asian metabolism flag under Precision controls. It applies a 0.95 multiplier — small but meaningful over a 12-week cut.

Cut size

How aggressive a deficit can you sustain?

The honest ranges:

  • 10–15% deficit (mild–moderate) — sustainable indefinitely, sleep and gym performance hold up, ~0.5% bodyweight per week.
  • 15–20% deficit (the sweet spot) — what most successful cuts run at. Visible progress, hunger manageable, ~0.7% BW/week.
  • 20–25% deficit (aggressive) — viable in short 8–12 week blocks if you keep protein at 2.2 g/kg and sleep 7+ hours. Muscle loss climbs above this.
  • >25% deficit — reserved for medically supervised scenarios. The body burns muscle to spare fat, RMR collapses, and adherence tanks.

Bulking

The lean-gain bias

Natural lifters gain muscle slowly — 0.5–1 kg/month for beginners, 0.2–0.4 kg/month at intermediate, 0.1–0.2 kg/month for advanced. A surplus larger than 200–300 kcal just adds fat. Stay 8–15% above maintenance, lift hard, sleep, and recalculate every 4 weeks.

When to recalculate

This number expires every 4–6 weeks

Recompute your TDEE when any of the following changes:

  • Weight moves more than 3 kg
  • Step count shifts by more than 1,500/day on average
  • You add or drop two training sessions per week
  • You hit a plateau lasting more than 14 days
  • You start or stop thyroid / hormonal medication

Medical disclaimer

This calculator gives an estimate for healthy adults. It is not a substitute for medical advice. If you are pregnant, lactating, under 18, recovering from an eating disorder, or being treated for diabetes, thyroid, cardiovascular or kidney conditions, work with a qualified doctor or registered dietitian before changing your calorie intake.

How it works

BMR — base metabolism. We compute all four leading equations in parallel: Mifflin–St Jeor (1990, the gold standard), Harris–Benedict (revised 1984), Katch–McArdle and Cunningham (when body-fat % is known). You can pick the formula or trust the default.

TDEE = BMR + TEF + NEAT + EAT. TEF is ~10% of BMR (digestion). NEAT comes from your daily step band. EAT comes from structured exercise hours × intensity. This is the same model indirect calorimetry studies decompose energy expenditure into — it's just normally hidden behind a single "activity level" picker.

Context multipliers let the result reflect real physiology: South Asian metabolism (×0.95), PCOS (×0.95), hypothyroid (×0.92), postmenopausal (×0.97), prolonged cut (×0.92). These compound with your formula-derived BMR.

12-week trajectory bakes adaptive thermogenesis into the weight projection — RMR drifts down ~2.5%/week of cutting, so the straight-line "7,700 kcal = 1 kg" math overpredicts loss by week 8. The chart shows both lines.

Frequently asked questions

  • Which BMR formula should I use?

    Default to Mifflin–St Jeor — it has the best validation against indirect calorimetry in healthy adults. If you know your body fat % and you're lean (under ~15% men, ~22% women), Katch–McArdle is slightly more accurate because it works off lean body mass. Cunningham runs about 5% higher than Katch and suits trained athletes. Harris–Benedict is included for comparison but tends to overestimate slightly for sedentary modern populations.

  • Why ask for steps and exercise separately instead of one activity level?

    Because 'Moderately Active' means different things to different people, and almost everyone picks one tier too high. Daily step count is the single best proxy for NEAT (non-exercise activity thermogenesis), and structured exercise hours × intensity captures EAT. Computing the multiplier from both removes the inflation bias that creates 300–500 kcal errors in legacy calculators.

  • Should I trust the South Asian adjustment?

    If you're of native South Asian descent, yes. Studies by Henry (2005) and the ICMR-NIN 2020 dietary guidelines show RMR running roughly 5% below European-reference predictions — partly body composition (lower lean mass for height), partly genuine metabolic difference. A 0.95 multiplier is conservative and well-supported.

  • How aggressive a deficit can I sustain?

    10–15% is sustainable indefinitely. 15–20% is the sweet spot for an 8–16 week cut. 20–25% is viable in short blocks if protein stays at 2.2 g/kg and you sleep 7+ hours. Above 25% you start losing muscle, RMR collapses, and adherence falls apart. The deficit slider in the tool is capped at 30% for that reason.

  • Why does the 12-week projection curve away from a straight line?

    Adaptive thermogenesis. As you lose weight, RMR drops by more than weight loss alone would predict — Trexler 2014 documents 10–15% additional declines after 8–12 weeks of cutting. The dashed line shows the naïve '7,700 kcal = 1 kg' projection; the solid line shows what your body actually does. The gap is why most cuts stall around weeks 6–8 unless you plan a diet break.

  • Why is my real-world result different from this number?

    Four big sources: (1) under-reporting calorie intake — research finds people under-log by 400–600 kcal/day even when motivated; (2) NEAT suppression in a deficit — your body unconsciously moves less; (3) adaptive thermogenesis after 8+ weeks of cutting; (4) measurement noise on the scale (water, glycogen, food in the gut). Expect to adjust your target by ±15% within 4 weeks based on real weight trend. The calculator gives you the starting hypothesis; your scale gives you the answer.

  • When should I recalculate?

    Recompute whenever weight has moved more than 3 kg, your step count shifts by more than 1,500/day on average, you add or drop two training sessions per week, or you hit a plateau lasting more than 14 days. Also recalculate after any thyroid / hormonal medication change.

  • Why are workouts such a small slice of TDEE?

    Because they're short. A hard 60-minute resistance session burns roughly 300–450 kcal — less than a single homemade meal. The big movers are BMR (~65% of TDEE) and NEAT (~15%, but can swing by 2,000 kcal/day between people). This is why 'just exercise more' rarely outpaces a diet that's 300 kcal too high.