In order to calculate the percentage of weight you have lost, you must first determine your weight prior to any weight loss attempts. Your initial weight serves as a baseline, against which your new weight will be compared. The calculations used to determine the actual percentage of weight lost is not difficult to perform and takes little time. The key is having the forethought of finding your initial weight and recording it to have for use later.
Step 1
Write down your weight prior to engaging in any attempt to lose weight. Keep this number as it will serve as the initial baseline against which your weight loss will be determined.
Step 2
Record your new weight after working towards you goal of weight loss, using whatever means you have decided to use. Write your new weight next to your initial weight; your new weight will serve as the baseline for your next weight check.
Step 3
Divide your first weight into your new weight. For example, if prior to beginning your weight loss routine you weighed 270 lbs. and now you weigh 265 lbs., your equation will look like this: 265 / 270 = 0.981.
Step 4
Subtract one from your answer in Step 3. If your answer in Step 3 was .981, you equation will look like this: .981 - 1 = -.019.
Step 5
Multiply your answer from Step 4 by 100. If your answer was -.019, your equation will look like this: -.019 X 100 = -1.9.
Step 6
Round your number to the nearest whole number. If you answer was -1.9, round it to -2. If the number is a negative number, you have lost weight. If the number is a positive number, you have gained weight. Based on your results of -2., you have lost 2 percent of your weight.
Tips and Warnings
- Write each step on paper to ensure you do not confuse any of your numbers or steps. Keep track of each new weight so you can accurately determine your weight loss each step along your journey.
- Consult a physician prior to beginning a new weight loss program to ensure your safety. Starvation is not a healthy way to lose weight. Make sure your new weight loss strategy provides your body with enough nutrients to ensure your safety.
References
- "Essentials of Strength Training and Conditioning"; National Strength and Conditioning Association; 2000
- "Personal Trainer Manual"; American Council on Exercise; 1997
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