Understanding TDEE for Sustainable Weight Loss
Your Total Daily Energy Expenditure is the foundation of every effective nutrition plan. Here's how to use it without crash dieting.
Total Daily Energy Expenditure (TDEE) is the total number of calories your body burns in 24 hours. It combines your basal metabolic rate, the thermic effect of food, exercise, and everyday movement.
What makes up your TDEE
- BMR (60–70%): energy needed to keep you alive at rest.
- TEF (~10%): energy used to digest food. Protein has the highest thermic effect.
- EAT (5–10%): planned exercise.
- NEAT (15–30%): walking, fidgeting, standing, household chores.
How to create a safe deficit
A deficit of roughly 500 kcal per day typically produces about 0.5 kg (1 lb) of weight loss per week. Larger deficits increase muscle loss, fatigue, and the risk of rebound weight gain.
A practical example
A 35-year-old woman, 70 kg, 165 cm, moderately active, has a TDEE of about 2,130 kcal. A sustainable target would be around 1,630 kcal per day, with at least 1.6 g of protein per kg of body weight.
Re-calculate as you progress
As your weight drops, your TDEE drops too. Re-run the calculation every 4–5 kg lost to keep your targets accurate.
The bottom line
TDEE is an estimate, not a prescription. Track your weight trend for 2–3 weeks and adjust by 100–200 kcal if results don't match expectations. Consult a healthcare professional before starting any significant diet change.
Dr. Maya Chen, RD
Contributor at fitbmicalc, writing evidence-based guidance on nutrition, training and healthy habits.