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Calorie Deficit Calculator
Compare calorie intake with estimated daily expenditure to calculate a deficit or surplus.
- Deficit (+) or surplus (−), kcal/day
- 300
- Share of expenditure, %
- 12.5
How the calculation works
Deficit = expenditure − intake; relative deficit = deficit/expenditure × 100%.
Inputs
- Estimated expenditure, kcal/day
- Intake, kcal/day
Calculation details
An adult estimate, not for children, pregnancy, or a personal treatment plan. Discuss results with a clinician or dietitian when managing illness or changing your diet.
The result describes a difference, does not prescribe a diet, and does not predict weight change. Metabolism and expenditure change over time.
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Sources
Updated: 2026-10-02