Fat Loss from Deficit

This formula estimates how much body fat could be lost when you eat fewer calories than you burn over time. The number 7700 comes from an approximate energy content of 1 kilogram of human fat tissue, so a cumulative deficit of 7700 kcal is often treated as roughly 1 kg of fat loss. It is only an estimate because real body weight changes also involve water, glycogen, muscle tissue, and metabolic adaptation.

Use this when you want a rough estimate of fat loss from dieting, especially for planning or checking whether a calorie target is likely to produce meaningful progress. It is most useful for short-to-medium time frames and for tracking trends rather than predicting an exact scale reading.

• Using daily deficit without multiplying by the number of days
• Assuming the scale will drop by exactly the same amount as estimated fat loss
• Treating 7700 kcal as a precise universal constant for every person and situation