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Weight loss scenario calculator
Explore a transparent, simplified energy-balance scenario for a weight goal. It is arithmetic, not a prediction of how your body will respond.
How does this weight loss calculator work?
Enter a current weight, a lower goal weight and a daily calorie deficit you already want to examine. The page applies a fixed linear energy-per-weight assumption to show a mathematical scenario. It does not recommend a calorie deficit, create a diet or predict your actual weight change.
Frequently asked questions
How does this weight loss calculator work?
Enter a current weight, a lower goal weight and a daily calorie deficit you already want to examine. The page applies a fixed linear energy-per-weight assumption to show a mathematical scenario. It does not recommend a calorie deficit, create a diet or predict your actual weight change.
Are my weight details uploaded?
No. The calculation runs in this browser and the entered numbers are not sent to a server or saved by this page.
Is this a prediction of how much weight I will lose?
No. It applies a fixed linear calorie-to-weight assumption. NIDDK explains that body-weight change is dynamic, so this simple arithmetic can overstate longer-term change.
What happens when the daily deficit is zero?
The modeled energy change is zero, so the page reports no modeled weight change and no finite timeline.