Measuring Your Body Composition: A Step-by-Step Guide

The Samsung Galaxy Watch 6 series is one of the most in-demand smartwatches available. They offer remarkable performance, a customizable design, and some of the finest health-tracking options. Additionally, they come with an integrated BIA (Bioelectrical Impedance Analysis) sensor, which measures body composition, including body fat percentage and skeletal muscle mass, directly from your wrist.



The body composition measuring feature is not exclusive to the Galaxy Watch 6 series. The Watch 4 and Watch 5 series also include this functionality. Keep reading to discover how to utilize your Samsung Galaxy Watch for body composition measurement.



Which body composition metrics can your Samsung Galaxy Watch measure?

Modern Samsung Galaxy Watch models with a BIA sensor can track skeletal muscle, fat mass, body fat percentage, Body Mass Index (BMI), body water, and Basal Metabolic Rate (BMR). These metrics provide a comprehensive overview of your health beyond BMI. You’ll need to weigh yourself using a scale and manually input the data before starting the measurement process since the watch cannot measure your weight.


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 demonstrated that Samsung’s BIA sensor produces consistent but slightly less accurate measurements compared to DXA and lab-grade octapolar bioelectrical impedance measurements. It’s important to note that Samsung Galaxy smartwatches are not medical devices, so your measurements could vary based on how you wear your device.




These measurements offer valuable insights into your health and allow you to monitor key metrics without the need for specialized medical equipment. While Samsung’s BIA sensor may be slightly less accurate than measurements taken in a medical facility, it can provide consistent data when the smartwatch is worn correctly. For the most accurate readings, it’s recommended to measure your body composition early in the morning on an empty stomach and before engaging in any physical activity.




Which Samsung smartwatches can measure body composition?

All of the most recent Samsung Galaxy Watch variants, including the Watch 4, Watch 4 Classic, Watch 5, Watch 5 Pro, Watch 6, and Watch 6 Classic, are equipped with a built-in BIA sensor for measuring body composition. You do not need to have a Samsung Galaxy phone to utilize this feature; it can be used when paired with a non-Samsung smartphone.


  • 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


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


How to measure body composition using 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 the feature, including those with pacemakers or similar devices implanted in their bodies, pregnant individuals, and those under the age of 20. To initiate the process of measuring body composition, you must use your smartwatch:

  1. Open the app drawer on your Galaxy Watch by swiping up on the display.
  2. Access the Samsung Health app.
  3. Tap Body composition after scrolling down.
  4. Tap Measure to begin the measurement process, or to view previously taken measurements.
  5. Provide your gender and input your height and weight if using the feature for the first time.
  6. Place your middle and ring fingers on the two physical keys on the right side of the watch as instructed by the guide.
  7. Confirm that your fingers are in contact with the keys and not touching your hands.
  8. Swipe right and tap OK to start the body composition measurement process.
  9. Remain still during the approximately 15-second measurement process and avoid contact with any objects.

You can view the results on your watch or smartphone using the Samsung Health app. Over time, the app displays a graph of how your measurements have changed and allows you to set targets and receive reminders regarding your body composition metrics from Samsung Health.




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

For accurate measurements with your Galaxy Watch, wear it properly on your wrist, position it higher up, and extend your arms away from your body to ensure they are not pressed against your torso. It’s common for body composition measurements to fail around the 80% completion mark, and there are several reasons why the watch might struggle to take a reading. Moisturizing your hands and fingers, positioning the watch sensor on the inside of your wrist, and ensuring a snug fit can all improve measurement accuracy.


Restarting the watch and considering a hard reset as a last resort may also help address measurement issues.



Make the most out of your Samsung Galaxy Watch

Now that you know how to use your timepiece’s body measurement functionality, take advantage of its other features, such as making and receiving calls, running third-party apps, and pairing with a Samsung Galaxy smartphone to access all the available functionalities.



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