Weight Loss Time Formula:
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The weight loss time calculation estimates how long it will take to reach your goal weight based on your current weight and daily calorie deficit. It uses the principle that 1 pound of fat equals approximately 3500 calories.
The calculator uses the following equation:
Where:
Explanation: The equation calculates how many days it will take to burn the calories equivalent to your desired weight loss at your current daily deficit rate.
Details: A consistent calorie deficit is essential for weight loss. This calculator helps you plan realistic timelines for your weight loss goals based on your deficit.
Tips: Enter your current weight and goal weight in pounds, and your daily calorie deficit in kcal/day. All values must be valid (current weight > goal weight, deficit > 0).
Q1: How accurate is this calculation?
A: It provides an estimate based on the 3500 kcal/lb rule, but individual results may vary due to metabolic adaptations and other factors.
Q2: What's a safe daily calorie deficit?
A: Generally 500-1000 kcal/day for 1-2 lbs/week weight loss. Extreme deficits can be unhealthy and counterproductive.
Q3: Why 3500 calories per pound?
A: This is the estimated energy content in one pound of body fat, though actual composition may vary slightly.
Q4: Does this account for plateaus?
A: No, the calculation assumes linear weight loss. In reality, metabolism adjusts and plateaus may occur.
Q5: Should I recalculate as I lose weight?
A: Yes, as your weight changes, your maintenance calories will change, so you may need to adjust your deficit.