Using TDEE for Weight Loss: How Many Calories Should You Eat?

Most diets fail not due to lack of willpower, but because people calculate their daily energy needs incorrectly. Relying on generic 2,000-calorie nutrition labels ignores individual differences in height, weight, age, sex, and daily physical movement.

Why TDEE is the True Baseline

TDEE is your physiological breakeven point:

• Eat at TDEE: Body weight remains stable (Energy In = Energy Out).
• Eat above TDEE: Surplus energy is stored as glycogen, muscle, or adipose fat.
• Eat below TDEE: Body draws upon endogenous fat stores to bridge the energy deficit.

Step-by-Step TDEE Calibration Protocol

1. Calculate your estimated TDEE using the Mifflin-St Jeor equation.
2. Track your daily food and drink intake accurately for 14 consecutive days using a digital food scale.
3. Weigh yourself each morning after waking and using the bathroom.
4. Compare your 7-day average weight between Week 1 and Week 2:
   • If weight is completely flat: your intake matches your true empirical TDEE.
   • If losing ~1 lb/week: you are currently in a ~500 kcal daily deficit.
   • If gaining weight: your intake is above maintenance.

Model your daily targets with our client-side Calorie Deficit Calculator.