Free, private tool
A clearer view
of your change.
Weight loss percentage is the difference between starting and current weight, divided by starting weight, multiplied by 100.
No account. No upload. Your entries stay in this page and are not saved.
How the calculation works
((Starting weight − current weight) ÷ starting weight) × 100. For example, a recorded change from 100 kg to 95 kg is 5%. The percentage is the same in pounds when both weights use the same unit. An increase is shown as a gain, not celebrated as a loss.
What this number cannot tell you
This tool describes two entered observations. It does not predict future change, establish a healthy target, measure body composition or assess whether treatment is appropriate. It does not know which costs or observations you omitted.
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GLP Mirror is available now on Android. The iPhone release is in preparation.