What is TDEE (Total Daily Energy Expenditure)?

The Four Components of TDEE

BMR (60–75% of TDEE) — Basal metabolic rate is the calories your body burns just keeping you alive: heart, lungs, brain, organs, basic cell turnover. For most adults this is 1,200–1,800 cal/day. BMR scales with bodyweight, lean mass, age, and sex. A 200 lb man's BMR is typically 1,800; a 130 lb woman's is closer to 1,300.

TEF (~10% of TDEE) — The thermic effect of food is the calories your body burns digesting and processing what you eat. Protein has the highest TEF (~25–30% of its calories go to digestion); carbs are ~5–10%; fat is ~0–3%. This is a real reason high-protein diets feel less calorie-dense than they look on paper.

NEAT (15–20% of TDEE) — Non-exercise activity thermogenesis is every calorie you burn moving that isn't formal exercise: walking, standing, fidgeting, doing dishes, taking stairs. NEAT is the most variable component — a fidgety construction worker can burn 800+ cal/day from NEAT alone; a desk worker who Ubers everywhere might burn 150.

Exercise (5–15% of TDEE) — Formal training. A 45-minute lifting session burns 200–350 cal; a 5-mile run burns 500–700. Exercise is the smallest component for most people, which is why "I'll just work it off" rarely fixes a diet problem.

How to Calculate Your TDEE

Step 1: Calculate BMR with the Mifflin-St Jeor formula.

Men: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5
Women: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age − 161

Step 2: Multiply BMR by your activity factor.

• 1.2 — Sedentary (desk job, no exercise)
• 1.375 — Light activity (1–3 light workouts/week)
• 1.55 — Moderate (3–5 workouts/week)
• 1.725 — Active (6–7 hard workouts/week)
• 1.9 — Very active (physical job + daily training)

Example: A 185 lb (84 kg), 5'10" (178 cm), 28-year-old man who lifts 4x/week. BMR = (10 × 84) + (6.25 × 178) − (5 × 28) + 5 = 840 + 1,113 − 140 + 5 = 1,818. TDEE = 1,818 × 1.55 = ~2,820 cal/day. This is an estimate — actual TDEE varies ±10–15% based on NEAT and metabolic differences. The honest way to dial it in: track for 2 weeks at maintenance and adjust.

Using TDEE for Cutting and Bulking

Cutting — Eat 300–500 cal/day below TDEE. A 2,820 TDEE cutter targets ~2,400 cal/day, which produces roughly 0.75–1 lb of fat loss per week (a pound of fat is ~3,500 cal). Steeper deficits (700+) accelerate fat loss short-term but cost more muscle and are harder to sustain. See what is cutting for the full strategy.

Bulking — Eat 200–400 cal/day above TDEE. A 2,820 TDEE lifter targets ~3,100 cal/day, producing ~0.5 lb gain per week, mostly muscle if protein and training are dialed in. Bigger surpluses just add fat — muscle protein synthesis is rate-limited.

Maintenance — Eat at TDEE. This is the right call most of the year for most people; cuts and bulks are intentional phases, not the default state.

TDEE and Fast Food

Most cutting TDEEs land between 1,500 and 2,200 cal/day. That means a single fast food meal needs to fit under 500–700 calories to leave room for the rest of the day. A McDonald's Double Cheeseburger alone (440 cal, 25g protein — verified MacroMate macros) eats a third of a 1,500-cal cutting budget for only 25g protein.

The macro-friendly cutting alternative: a Chick-fil-A 12-Piece Grilled Nuggets (200 cal, 38g protein) — fewer calories AND more protein. Or a Buffalo Wild Wings Naked Tenders 5pc (250 cal, 63g protein) — the highest protein-to-calorie ratio in MacroMate's database at 0.252. See the full best fast food for cutting tier list and our highest protein-per-calorie leaderboard for orders that fit a cutting TDEE.

For bulking TDEEs (2,800–3,500+), absolute protein matters more than P:C ratio. A Cane's Caniac Combo (~111g protein) fits easily into a 3,200 cal day. The cheapest high-protein fast food guide ranks orders by protein-per-dollar for cost-aware bulking.

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