Calorie Deficit Calculator

Estimate daily calorie targets and weight loss pace.

Formula & Methodology

Deficit = TDEE − target intake; weight loss pace ≈ deficit × days / 3,500 calories per pound.

Worked Example

A 500-calorie daily deficit yields about 1 lb of weight loss per week.

Frequently Asked Questions

How big should my deficit be?

A 300–500 calorie daily deficit supports steady loss of about 0.5–1 lb per week with less muscle loss than extreme deficits.

Why does weight loss slow over time?

As you lose weight, TDEE drops and the body adapts, so you may need to adjust intake or activity to keep losing.

Is this medical advice?

No. Consult a provider before significant calorie restriction, especially with health conditions.

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