How Long Will It Take to Lose Weight?
Weight loss duration depends on how much you want to lose and your daily calorie deficit. One pound of fat contains roughly 3,500 calories, and one kilogram contains approximately 7,700 calories. At a 500 kcal/day deficit, you can expect to lose about 1 lb (0.45 kg) per week — a safe and sustainable rate.
The American Heart Association recommends a weight loss rate of 1–2 lbs (0.45–0.9 kg) per week, which corresponds to a daily deficit of 500–1,000 calories. Deficits above 1,000 kcal/day can lead to muscle loss, fatigue, and metabolic adaptation, slowing long-term progress. Combining dietary changes with exercise produces better results than either alone.
Frequently Asked Questions
Fat tissue contains about 87% triglycerides, which store approximately 9 kcal per gram. One kilogram of body fat therefore contains roughly 7,700 kcal of stored energy.
0.5–1 kg (1–2 lbs) per week is the recommended safe range. This requires a daily deficit of 500–1,000 calories.
Combine dietary reduction (smaller portions, fewer processed foods) with physical activity. A mix of cardio and strength training produces the best long-term results.