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Frank:
The three most common ways to calculate body fat are hydrostatic weighing, skinfold calipers and home body weight scales equipped with bioelectrical impedance. Let’s start with most accurate and work our way down to the least accurate.

The best way to determine body fat is hydrostatic weighing.  In order to take this test you’re body must be lowered into a giant tank of water. Since muscle is denser than fat your body composition can be determined based on how much water you displace. People that have a low body fat will displace more water than those with a higher body fat percentage.

The problem with this test is finding a place that actually offers it to the public. I have tried but have had no luck. If you’re interested you’re best bet is a major university or medical facility. Good luck!

The second most accurate way to determine body fat is the skinfold method. This test   uses a large set of calipers to lightly pinch the skin in several key areas. The calipers allow you to measure the thickness of fat on the outer layer of skin. You then compare the measurements to a chart and you have your body fat percentage.

In my opinion this is the most practical method because it’s accurate, affordable and user friendly. With a little practice anyone can become good at performing the skinfold method. However it’s important to consistently use the same person to conduct the test or you’re results will vary. You can purchase a pair of calipers online for prices ranging from $20-$250. Most personal trainers can also do the test for a small fee.

The least effective way to test your body fat is bioelectrical impedance or electric body fat scales. Bioelectrical impedance works by sending low level electrical currents through your body to determine your body fat. This method is popular because it is quick and easy. Recent advances in technology have made it possible to add bioelectrical impedance to scales and sell them at reasonable prices. These scales are supposed check your body weight and composition in one shot. However there are many factors that can change your results. For example the amount of water in your body, your skin temperature and recent physical activity can cause the test to be very inaccurate. Since this method is not the most accurate in the first place these factors can make it even worse. I have personally tried body fat scales and have been disappointed with their inconsistency.

I agree. You are more likely to be consistent if you see progress. If testing your body fat motivates you I suggest using the skin fold method. It’s accurate affordable and fairly easy to do. Body measurements are also a great way to determine results. Combine them with before and after pictures and you will have all the proof you need.