Health calculator
Calorie Deficit Calculator
Estimate daily calorie deficit, weekly weight-change pace, and target-loss time.
Formula
Calorie deficit
Weight change is not perfectly linear. Medical, nutritional, and eating-disorder concerns should be discussed with a qualified professional.
Daily deficit = maintenance + exercise - intake
2,400 maintenance + 200 exercise - 1,900 intake gives a 700 kcal deficit.
FAQs
Why use 7,700 kcal per kg?+
It is a broad planning approximation for fat-mass energy.
Can the deficit be too large?+
Yes. Very aggressive deficits can be unsafe or unsustainable.
How does the Calorie Deficit Calculator calculate the result?+
It uses the Calorie deficit: Daily deficit = maintenance + exercise - intake. 2,400 maintenance + 200 exercise - 1,900 intake gives a 700 kcal deficit.
What information do I need to use the Calorie Deficit Calculator?+
Estimate daily calorie deficit, weekly weight-change pace, and target-loss time.
How accurate is the Calorie Deficit Calculator?+
Calorie Deficit Calculator applies the formula and assumptions shown on this page. Results may be rounded for readability, so verify changing rates, thresholds, medical guidance, or legal rules with the cited source or a qualified professional.
What should I check before using the Calorie Deficit Calculator result?+
Check that the units, dates, rates, and assumptions match your situation. Change one input at a time to understand which values have the largest effect on the result.
Health guide
How to use the Calorie Deficit Calculator
Estimate daily calorie deficit, weekly weight-change pace, and target-loss time. The page also explains the calorie deficit and shows a practical example: 2,400 maintenance + 200 exercise - 1,900 intake gives a 700 kcal deficit.
- 1
Enter your details
Enter the values for the calorie deficit calculator scenario you want to check.
- 2
Check the calculation
Review the result alongside the calorie deficit: Daily deficit = maintenance + exercise - intake.
- 3
Compare scenarios
Change one or more inputs to see how they affect the calorie Deficit Calculator result before you use the estimate.
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