Health

Calorie Deficit Calculator

Target calories from estimated needs and desired deficit.

Updated on Apr 21, 2026 Calculator, calculation path and examples on one page

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Calculator

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Related guide: BMI, calorie needs and calorie deficit – putting the numbers in context

Examples

Typical calculations

2,400 kcal requirement, 500 kcal deficit.

Moderate deficit

Target calories: 1,900 kcal

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32 years, 78 kg, 178 cm, moderately active.

Automatic estimation

Target calories: 2,293 kcal

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2,050 kcal requirement, 250 kcal deficit.

Slight deficit

Target calories: 1,800 kcal

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FAQ

Frequently asked questions

What is a calorie deficit?

You absorb less energy than you use in everyday life.

How big should the deficit be?

Many people plan moderately, for example with 300 to 500 kcal per day.

Can the computer estimate the demand itself?

Yes, in automatic mode it uses the same logic as the calorie requirement calculator.

Is a very large deficit better?

Not necessarily. High deficits are often more difficult to maintain and do not fit every goal.

Does the calculator replace nutritional advice?

No. It only provides a calculation aid for initial orientation.

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Sources and notes

Rule status and context

methodology
Target calories = total requirement − desired deficit