Calorie Deficit Calculator

Estimate target calories and timeline based on body weight goal and daily deficit.

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What This Calculator Does

Estimate target calories and timeline based on body weight goal and daily deficit.

It combines Current Weight, Goal Weight, Daily Calorie Deficit to estimate Estimated Timeline, Weight to Lose, Estimated Days.

Formula & Method

Core equations: Weight-change model: \Delta W\,(lb)\approx\frac{\Delta kcal_{daily}\cdot d}{3500} and target calories =TDEE-\Delta kcal_{daily}.

Notation used in the formulas: R = Estimated Timeline; x_{1} = Current Weight; x_{2} = Goal Weight; x_{3} = Daily Calorie Deficit.

Method summary: inputs are normalized to consistent units, core equations are evaluated, then secondary values are derived and rounded for display.

Use this calculator for quick scenario analysis. Start with baseline values, change one driver at a time, and compare how sensitive the results are to each input shown above.

Inputs Used

Current Weight: Used directly in the calculation.
Goal Weight: Used directly in the calculation.
Daily Calorie Deficit: Used directly in the calculation.

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