In order to properly calculate your percentage of weight lost, you must have two weights to compare. The first weight is your weight prior to any attempt to lose weight, whether nutritionally-based and/or from exercise, while the second weight is the new weight you have achieved. The computation is easier than you may think and can give you insight into the success or failure of your current weight loss program.
Step 1
Determine your weight prior to beginning your weight loss program. Keep a record of this weight in order to determine your weight loss percentage.
Step 2
Use your weight loss program to the best of your ability to lose weight.
Step 3
Use a scale to determine your current weight. Keep a record of your new weight.
Step 4
Divide your new weight by your previous weight. For example, if you previously weighed 250 lbs., and you now weigh 230 lbs., your equation will look like this: 230 / 250 = 0.92.
Step 5
Subtract your calculated answer in step 4 from the number one. If the answer is a negative number, the answer represents weight loss. If the answer is a positive number, the answer represents weight gain. For example, if your answer to step 4 was 0.92, your equation will look like this: 0.92 - 1 = -0.08.
Step 6
Multiply your answer to step 5 by one hundred. this will make your answer to step 5 a percentage. If your answer to step 5 was -0.08, your equation will look like this: -0.08 × 100 = -8.0. Based on your answer, you have lost eight percent of your body weight.
Step 7
Look at your answer to step 6. If the answer is a negative number, your program is successful in terms of weight loss. If the answer is a positive number, the program is not successful because you have gained weight.
Tips and Warnings
- Write-out each step so you do not confuse any information. Any misused information will invalidate your answers. Make sure you keep track of your new weights so you can continually track your success or failure.
- Consult a physician prior to beginning any new exercise program. Rapid weight loss in short periods of time can be unsafe.
Things You'll Need
- Calculator
- Pen or pencil
- Paper
- Scale
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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