Weight Loss Percentage Calculator

It is often a real challenge to lose weight. It can take a huge amount of effort and entail a great deal of commitment. You can use this calculator as an important tracking tool on your weight loss journey.

To use the calculator, enter your starting weight on the top line and your present weight on the lower line. Then, click on "Calculate" to see how much weight you've lost as a percentage of your starting body weight.

Weight Loss Percentage Calculator

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Results
Weight Loss Percentage:
Total Weight Loss:

How the Calculator Works

To calculate your weight loss percentage, your current weight is subtracted from the weight you were at when you first began your efforts to lose weight. This figure is then divided by your starting weight and the resulting number is multiplied by 100. This will give you your weight loss percentage. This formula can be presented as follows:

Weight Loss Percentage (%) = [ (Starting Weight − Current Weight) / Starting Weight ] × 100

If the calculator returns a positive figure, this shows that you have gained weight, while a negative figure shows that you have lost weight.

Let's take an example. You now weigh 180 pounds but began at 200 pounds. So, 180, your current weight, is subtracted from 200, your starting weight, resulting in 20. You've lost 20 pounds. The number 20 then needs to be divided by your starting weight, the result of which is 0.10. Finally, multiply 0.10 by 100 and you get 10. You have lost 10% of your starting weight.

Take another look:

Starting weight: 200 pounds

Current weight: 180 pounds

200 − 180 = 20

20 / 200 = 0.10

0.10 × 100 = 10%

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