Weight Loss Percentage Formula:
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Body weight percentage loss is a standardized way to measure weight loss that accounts for differences in starting weight. It provides a more meaningful comparison than absolute weight loss numbers.
The calculator uses the percentage loss formula:
Where:
Explanation: The formula calculates what percentage of your original body weight you have lost.
Details: Percentage weight loss is clinically significant as even modest losses (5-10%) can lead to health improvements. It's also useful for comparing progress among individuals with different starting weights.
Tips: Enter both weights in kilograms (kg). For accurate results, weigh yourself at the same time of day under consistent conditions (e.g., morning after bathroom use).
Q1: What's considered significant weight loss?
A: Clinically, 5% is considered meaningful, 10% is significant, and 15% or more is substantial weight loss.
Q2: How often should I calculate my percentage loss?
A: Weekly or bi-weekly measurements are recommended to track trends without overemphasizing daily fluctuations.
Q3: Why use percentage instead of pounds/kilos lost?
A: Percentage accounts for different starting weights, making progress comparable between individuals.
Q4: Is there a maximum healthy percentage loss rate?
A: Generally, 0.5-1% of body weight per week is considered safe and sustainable for most people.
Q5: Does this work for weight gain calculations too?
A: Yes, the same formula can show percentage weight gain by reversing the subtraction.