Calorie Deficit Calculator
Calculate a target daily intake from TDEE and a user-selected calorie deficit, with conservative adult-only warnings.
Enter or adjust the values above, then calculate.
Calorie Deficit: daily Target & Weekly Deficit
Calculate a target daily intake from TDEE and a user-selected calorie deficit, with conservative adult-only warnings.
Inputs this tool uses
- Known TDEE
- Daily deficit
What you get
Arithmetic calorie target from your entered TDEE and deficit.
How to use the Calorie Deficit Calculator
- Enter known tdee, daily deficit.
- Select any method, activity level or option shown on this page, then choose Calculate.
- Read the main result together with the supporting values, method, assumptions and limitations below before using the estimate.
How this calculation works
Calorie-goal tools use arithmetic differences from entered maintenance energy. Any 7,700 kcal/kg weight-change conversion is shown only as an approximation.
Example calculation
The sample values loaded into the calculator produce 1800 kcal/day. This example exists to show how the output is structured; replace the sample values with your own inputs for your calculation.
Assumptions and limitations
- Energy and nutrient outputs are estimates or general reference values, not individualized treatment targets.
- Adult calorie-goal tools should not be used for children, pregnancy or medical nutrition therapy unless the page explicitly supports that life stage.
Sources and review status
Source set last verified 2026-09-25. No clinician review is claimed unless a real named reviewer is displayed.
Questions people ask about Calorie Deficit Calculator
Does a 500-calorie deficit guarantee a specific weekly weight loss?
No. The calculator can show the simple energy arithmetic, but real body-weight change is not perfectly linear and varies with physiology, adherence and time.
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