April 15, 2024

How to measure your body composition

The Samsung Galaxy Watch 6 series is among the most popular smartwatches on the market. They offer impressive performance, customizable design, and some of the best health tracking options. They also have a built-in BIA (Bioelectrical Impedance Analysis) sensor, which measures body composition. Calculate relevant numbers right from your wrist, such as body fat percentage and skeletal muscle mass.


The BIA sensor is not exclusive to the Galaxy Watch 6 series. The Watch 4 and Watch 5 series also have body composition measurement. Continue reading to learn how to use your Samsung Galaxy Watch to measure your body composition.


What body composition metrics can your Samsung Galaxy Watch measure?

The BIA sensor on modern Samsung Galaxy Watch models can track skeletal muscle, fat mass, body fat percentage, body mass index (BMI), body water, and basal metabolic rate (BMR). These figures provide a holistic overview of your health with respect to BMI. Since the watch cannot measure your weight, you will need to weigh yourself with a scale and enter it manually before starting the measurement process.

Dual-energy x-ray absorptiometry (DXA) is the gold standard for measuring body composition. A joint research study from Louisiana State University, Pennington Research Center and the University of Hawaii Cancer Center showed that Samsung’s BIA sensor provides consistent but slightly less accurate measurements than those taken with DXA and bioelectrical impedance measurements laboratory octapolar. Samsung Galaxy smartwatches are not medical devices. Your measurements may vary depending on how you use your device.

These measurements help you better understand your health status and track key metrics without specific medical equipment. Although Samsung’s BIA sensor may be a little less accurate than measurements taken in a medical facility, it should provide consistent data if you use your smartwatch correctly. Also, to get more accurate readings, measure your body composition early in the morning on an empty stomach before doing any physical activity.

Which Samsung smartwatches can measure body composition?

The last three generations of Samsung Galaxy Watch products come with a built-in BIA sensor that measures body composition. The timers below can measure and track your body composition:

  • Samsung Galaxy Watch 4
  • Samsung Galaxy Watch 4 Classic
  • Samsung Galaxy Watch 5
  • Samsung Galaxy Watch 5 Pro
  • Samsung Galaxy Watch 6
  • Samsung Galaxy Watch 6 Classic

The feature does not require you to have a Samsung Galaxy phone. You can use it even if the watch is paired with a non-Samsung phone.

How to measure body composition with your Samsung Galaxy Watch

Although Samsung’s body composition feature is a great way to monitor your health and fitness data, some people should not use it.

  • Do not use this function if you have a pacemaker or similar device implanted in your body.
  • Pregnant people should not use this function.
  • Readings may be inaccurate for people under 20 years of age.

You cannot start the process of measuring your body composition using your phone. You must use the smart watch:

  1. Swipe up on your Galaxy Watch screen to open the app drawer.
  2. Open the Samsung Health application.
  3. Scroll down and tap Body composition.
  4. Tap Extent to start the measurement process. If you measured your body composition previously, the readings are displayed here.
  5. The first time you use the feature, select your gender and enter your height and weight.
  6. A guide instructs you to place your fingers on the watch. Place your middle and ring fingers on the two physical keys on the right side of the watch.
  7. Confirm that your fingers are touching the keys and are not in contact with your hands.
  8. Swipe right and tap OK to start the process of measuring body composition.
  9. Remain still during the measurement process, which takes about 15 seconds. Do not come into contact with any objects during this period.

If the measurement process fails, wet your fingers and try again.

You can view the results on your watch or smartphone from the Samsung Health app. Over time, the app shows a graph of how your measurements have changed. You can also set goals and receive reminders from Samsung Health about your body composition metrics.

When you view your body composition results in Samsung Health on your phone, tap the three dot menu button in the upper right corner followed by To establish objectives. Then, enter your time, goal weight, body fat percentage, other metrics, and how long you aim to reach your goal. There is also an option to set Samsung Health to remind you to check your body composition levels.

What to do if the body composition measurement on your Galaxy Watch fails?

To take accurate measurements with your Galaxy Watch, wear it properly on your wrist. Place the watch higher on your wrist and extend your arms away from your body, making sure they are not pressed against your torso.

It is common for body composition measurements to fail around 80% complete. If your watch doesn’t take a measurement repeatedly, don’t worry. It usually does not indicate a deeper problem. There are several reasons why your watch may have difficulty taking a reading.

Firstly, moisturizing your hands, arms and fingers with a quality moisturizer can be a simple but effective solution, especially in colder climates.

Then, position the watch so that its sensor is on the inside of your wrist. Also, make sure the watch rides higher on your wrist and fits comfortably. Resetting the clock might help. As a last resort, consider performing a hard reset, although this may not always resolve measurement issues.

Get the most out of your Samsung Galaxy Watch

Now that you know how to use your watch’s body measurement feature, it’s time to get to know it better. For example, did you know that you can use your Samsung Galaxy Watch to make and receive calls? Plus, as a Wear OS watch, it runs third-party apps, which you can install in minutes. And if you want to take advantage of all the features of your smartwatch, you’ll need to pair it with the Samsung Galaxy S24 or any recent Galaxy smartphone.

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