Calorie Deficit

What is Calorie Deficit?

Eating fewer calories than you burn to lose weight.

Why it matters

A sustainable deficit drives fat loss while preserving health and performance.

How it works

Subtract 250–500 kcal from TDEE to lose roughly 0.25–0.5 kg (0.5–1 lb) per week.

TDEE 2,300 → target 1,800–2,050 kcal/day for steady progress.
A 500 kcal deficit leads to ~1 lb weekly loss; too large a deficit may cause muscle loss.
During a cut, track weight weekly and adjust calories if progress stalls.
Combine deficit with cardio and strength training for optimal body composition.
Post-bulk, a small deficit helps shed fat without losing gains.

How big should my deficit be?

250-500 kcal for sustainable loss; larger deficits risk muscle loss and fatigue.

Can I lose weight without a deficit?

No, weight loss requires burning more than you consume.

What if I hit a plateau?

Reassess TDEE, check adherence, or adjust deficit slightly.

Does deficit size affect muscle loss?

Larger deficits increase muscle loss risk; protein and training help preserve it.

How long can I maintain a deficit?

Indefinitely if moderate; extreme deficits are short-term.

Is a deficit safe for everyone?

Consult doctors if you have conditions; avoid if underweight or pregnant.

Can exercise create a deficit?

Yes, but diet is primary; combine for best results.

What about water weight?

Deficits can cause initial water loss; focus on fat over time.

How to calculate deficit?

TDEE minus target calories; use our calculator.

Does age affect deficit needs?

Older adults may need smaller deficits due to slower metabolism.

Can I deficit while building muscle?

Difficult; usually separate phases, but recomp possible for beginners.

What if I feel tired?

Reduce deficit or increase carbs; ensure adequate sleep.

Is intermittent fasting a deficit?

It can create one if total calories are lower.

How to end a deficit?

Gradually increase to maintenance to avoid rebound.