TDEE + Calorie Deficit: How to Use Both Together for Real Results
The Relationship Between TDEE and Deficit
TDEE is your maintenance calories. Your calorie deficit is how far below TDEE you eat. If your TDEE is 2400 and you eat 1900, your deficit is 500 calories. At that rate, you lose approximately 0.45 kg (1 lb) per week. The formula: weekly fat loss ≈ (daily deficit × 7) ÷ 7700.
Choosing the Right Deficit Size
Aggressive deficit (750–1000/day): loses weight faster but risks muscle loss and metabolic adaptation. Moderate deficit (400–600/day): sustainable, preserves most muscle with adequate protein. Mild deficit (200–300/day): slow progress but easiest to maintain long-term. Most people do best with a moderate 400–500 calorie deficit.
How to Preserve Muscle While in a Deficit
Eat high protein (1.6–2.2 g per kg of body weight). Maintain resistance training — this signals the body to keep muscle even while burning fat. Don’t go too aggressive — large deficits prioritize muscle as fuel. Use Macro Calculator to ensure protein targets are met within your calorie budget.
Recalibrating After Plateau
When weight loss stalls (more than 2–3 weeks of no change), your TDEE has likely dropped due to weight loss and metabolic adaptation. Recalculate TDEE at your current weight, then reestablish the deficit from the new baseline. Don’t just cut more calories — first verify your actual intake with a food log.
Frequently Asked Questions
Calculate TDEE and deficit
Use TDEE Calculator and Calorie Deficit Calculator together to build your weight loss plan.
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