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How Does the Wyze Scale Measure Body Fat?

Last Updated May 30, 2021
body fat measurement

Wyze Scales don’t just measure your weight; they can measure your body fat along with other biometric data. You probably know how weight is measured when you step on the scale, but you may be wondering how the Wyze Scale measures other things, especially body fat.

The Wyze Scale uses Bio-electric Impendence Analysis (BIA) to measure body fat. It sends out a small electric current to move through your muscles and fat to measure resistance. This measure of resistance is referred to as your body fat percentage.

You might be thinking of buying a Wyze Scale to get a more accurate picture of your health but aren’t sure how it works or whether it’s safe. Don’t worry; we will discuss exactly how the Wyze Scale works and measures body fat below.

How Does the Wyze Scale Measure Body Fat?

Wyze Scales use bioelectrical impedance analysis (BIA) to measure body fat. As you step on the scale, an electrical current is sent up one leg, into your pelvis, and then eventually down the other leg. The current will go through all your muscles and fat tissues. The current flow is also affected by the amount of water in these tissues.

Water can move through muscle much faster than fat. So, the more fat, the greater resistance in the electrical current. The BIA will measure the total resistance from water in body fat, giving you a more accurate picture of your health.

The resulting number on the Wyze Scale that you see may refer to any of the following:

  • A larger number means more resistance from the electrical current due to a higher presence of fat cells and a higher fat percentage.
  • Fat contains less water than muscle, making it denser. This is part of why water and the electrical current have a harder time moving through fat cells.
  • Muscle is easier for an electrical current to travel through, so it will result in a smaller resistance number if your muscle mass is greater than body fat.

Is the Wyze Scale Body Fat Analysis Safe?

If you saw the words “electrical current” and immediately got nervous, don’t worry. You won’t be able to feel the current at all while it is moving through your body. It is also determined to be safe by the medical community and shouldn’t cause most people any issues.

However, there are a few groups of people who shouldn’t use the Wyze Scale:

  • People with a pacemaker
  • Women who are pregnant or breastfeeding
  • Anyone with an electrical medical device in their body

If you have any doubt, call your doctor before using the scale and ask for their advice. In almost all cases, doctors will tell you to go ahead and step on the scale.

What’s the Accuracy of Wyze’s Body Fat Measurement?

The Wyze Scale body fat percentage measurement is considered to be pretty accurate. It can report within -/+ 1% of full-scale reading.

Keep in mind, though, that all smart scales can provide a rough estimate only. The accuracy also depends on a few key factors, so they may be more accurate for some than others. Results can be affected by:

  • Your height and stature
  • Your age
  • Your gender
  • Where you store most of your fat
  • If you frequently endurance or resistance train
  • Pregnancy

As mentioned above, most doctors recommend you not use the Wyze Scale when pregnant. Your result won’t be accurate anyway because the body stores fat differently when you are pregnant. Additionally, women naturally store more fat than men, so their numbers may be higher even if they exercise more often or if their weight is less. Studies by the National Library of Medicine also show that the results for children are not accurate.

Benefits of Body Fat Measurements on Wyze Scale

Having a scale that can measure body fat percentage has some pretty amazing advantages. The main advantage is that it provides a more accurate picture of your fitness.

For example, you might have been working out or weight training only to see the weight number on a scale go up. However, measuring body fat percentage might show you that your gained weight is actually from muscle, and you’ve been losing fat.

Some other advantages of the Wyze Scale measuring body fat are:

  • Encourages you and shows your hard work paying off
  • Let’s you measure at home rather than a gym or clinic
  • More accurate than BMI
  • Easier to see if your workouts are working or not
  • Results can be synced with several fitness apps, including Fitbit and Google Fit

Final Thoughts

The Wyze Scale is a great addition to your home whether you are a fitness guru or just beginning to work out. Its body fat percentage measurement will be able to give you a better picture of your health than other scales can. It will also allow you to track your fitness journey more accurately because you can compare your fat composition to your muscle mass.