How accurate is my Aria?

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The Fitbit Aria scale will measure your weight and body fat percentage. To improve accuracy in your scale's readings, consider the following tips:

  • If your Aria is picked up and moved between measurements, or stored sideways against a wall when not in use, the scale will calibrate the next time it is used for weighing. You may need to weigh yourself two or more consecutive times before the scale recalibrates and displays consistent measurements.
  • Make sure that your scale is placed on a hard surface during use. Carpet, linoleum, or any other flooring with resilience may affect the accuracy of the Aria's readings.
  • Your weight and body fat percentage will naturally vary over the course of a day and depend on what you eat and drink as well as your level of exercise and perspiration.
  • The Aria provides a unique measure at each weighing, unlike scales which try to prevent fluctuation by forcing consistency over accuracy.

The Aria measures your body fat percentage using body impedance. Because several different methods can determine body fat percentage and none are 100% accurate, the Aria's body fat reading may not match other scales or manual methods such as calipers exactly. To get a sense of what body fat percentage is healthy for you, you may want to review the standard body fat ranges for your age and gender. Several websites provide this information.

If your scale is not working correctly, contact Customer Support for further assistance.

Last updated: August 18, 2016
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