Weight Loss Percentage Calculator
This works out how much of your starting weight you have lost, as a percent. It is simple percent change, and it does not judge the result.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
Subtract the current weight from the starting weight to get the amount lost. Divide that by the starting weight, then multiply by 100.
The same method works for weight gain. A negative answer means the weight went up.
Worked example
Going from 180 lb to 165 lb is a change of 15 lb, which is 8.3 percent of the starting weight.
Questions
What is percent change?
It compares a change to the starting amount. Divide the change by the starting value and multiply by 100.
Why use a percent instead of pounds or kilograms?
A percent lets you compare changes of different sizes, since the same amount is a larger share of a smaller starting weight.
Does this say whether my change is good?
No. It shows the arithmetic only. Ask a doctor if you have questions about your weight.
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