Weight Loss Calculator

Knowing how long weight loss will take helps set realistic expectations and prevents discouragement. The fundamental equation: 1 pound of fat contains approximately 3,500 calories. A daily 500-calorie deficit produces roughly 1 pound of weekly loss. This calculator uses that principle combined with your TDEE to project your timeline and required daily intake.

Real weight loss rarely follows a perfectly linear path. Water retention, hormonal fluctuations, and changes in gut content can cause daily weight swings of 2–5 lbs even with a consistent calorie deficit. Tracking a 7-day average weight is far more useful than daily weigh-ins for assessing actual fat loss progress.

The "projected goal date" this calculator provides assumes a constant rate of loss with no metabolic adaptation. In reality, you'll likely need to recalculate and adjust every 10–15 lbs as your body changes. Some people also find it helpful to plan "diet breaks" — periods of 1–2 weeks eating at maintenance — to recover psychologically and hormonally from extended deficits.