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Weight Loss Time Formula:
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The weight loss time formula calculates how long it will take to reach your goal weight based on your current weight, goal weight, and daily calorie deficit. It's based on the principle that 1 pound of fat equals approximately 3,500 calories.
The calculator uses the weight loss time formula:
Where:
Explanation: The formula calculates how many days it will take to burn the calories equivalent to your desired weight loss at your current daily deficit.
Details: A calorie deficit occurs when you consume fewer calories than you burn. This forces your body to use stored fat for energy, resulting in weight loss. The size of your daily deficit determines how quickly you'll lose weight.
Tips: Enter your current weight and goal weight in pounds, and your daily calorie deficit in kcal/day. All values must be positive numbers, and your current weight must be greater than your goal weight.
Q1: Is 3500 calories really equal to 1 pound of fat?
A: While this is a commonly used estimate, individual results may vary based on body composition and metabolic factors.
Q2: What's a safe daily calorie deficit?
A: Generally, 500-1000 kcal/day deficit is recommended, leading to 1-2 lbs weight loss per week.
Q3: Why isn't my weight loss linear?
A: Weight loss is affected by water retention, muscle gain, hormonal changes, and metabolic adaptation.
Q4: Should I increase my deficit to lose weight faster?
A: Very large deficits can lead to muscle loss and metabolic slowdown. Sustainable weight loss is typically gradual.
Q5: Does this account for changes in metabolism?
A: No, this is a simple calculation. As you lose weight, your TDEE decreases, which may require adjusting your deficit.