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How do I get started with Fitbit scales?

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Weigh yourself with a Fitbit Aria series scale and sync with the Fitbit app to track your weight data and trends over time.

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How do I know which Fitbit scale I have?

If you're unsure whether you own Aria, Aria 2, or Aria Air, turn the scale over and remove the battery cover to see how many batteries it contains:

  •  Aria uses 4 AA batteries
  •  Aria 2 uses 3 AA batteries and has “Aria 2” written on the back of the scale
  •  Aria Air uses 3 AAA batteries. 

How do I set up my Fitbit scale?

Set up your Fitbit scale with the Fitbit app for iPhones and iPads or Android phones. For more information, see How do I set up my Fitbit device?

What does my Fitbit scale measure?

 Aria AirAria 2Aria
Weight
Body Fat % 
BMI
(in the Fitbit app)
Tap the Today tab User-added image > weight tile. Swipe left on the graph at the top to see your BMI data. 

For Aria 2, you can also see your BMI on the scale:

  1. Tap the Today tab User-added image > your profile picture. 
  2. Tap Aria 2 > People Using This Scale.
  3. Tap your name.
  4. Choose to show body fat percentage and BMI on your scale. The next time you weigh in and the scale syncs, the settings are saved.

How many people can use my Fitbit scale?

Fitbit scales can sync with up to 8 different Fitbit accounts. For more information, see How do I add or remove someone from my Fitbit scale?

How do I edit my weight data?

Edit your weight data in the Fitbit app. For more information, see How do I add, edit, or delete Fitbit data and activities?

How should I store and clean my Fitbit scale?

Your Fitbit scale should always be stored flat. When moved or stored vertically, you may need to perform 2 consecutive weigh-ins to recalibrate the scale. For instructions on how to clean your scale, see How do I clean my Fitbit device?

Is my Fitbit scale waterproof?

Fitbit scales aren’t waterproof, but are dust and water-resistant. If your scale gets slightly wet, wipe it with a dry towel. If it gets completely wet, take out the batteries immediately and let it dry.

How do I remove my personal data from my Fitbit scale?

For instructions on how to erase your scale, see How do I erase my Fitbit device?

Can I use my Fitbit scale if I’m pregnant or have an implanted medical device?

Aria and Aria 2 measure body mass using bioimpedance analysis, which sends a small electric signal through the body. Don’t use Aria or Aria 2 if you have an implanted medical device such as a pacemaker, or if you’re pregnant. Consult your doctor if you have any questions about using these devices. 

Technical specs are available on the Aria family smart scales page

Aria Air doesn’t use bioimpedance analysis and there are no restrictions on use if you are pregnant or have an implanted medical device.

What’s the difference between lean and regular mode?

Aria and Aria 2 have two modes to calculate body fat. The default is “regular” mode, which applies to most people. “Lean” mode is intended for professional or very high-level athletes with exceptionally low body fat relative to their muscle mass.

Note that Aria Air doesn't calculate body fat percentage.

If your scale’s current mode appears to give you an incorrect body fat percentage reading, try switching modes:

  • Fitbit app
    1. Tap the Today tab User-added image > your profile picture. 
    2. Tap Aria 2 People Using This Scale > your name.
    3. Turn Lean Mode on or off. The next time you weigh in and the scale syncs, the mode switches and your body fat percentage is calculated with the mode you selected.
  • fitbit.com dashboard
    1. From the fitbit.com dashboard, click the gear icon User-added image.
    2. Click Aria 2 > People tab > your name.
    3. Select the appropriate mode. The next time you weigh in and the scale syncs, the mode switches and your body fat percentage is calculated with the mode you selected.

How do I troubleshoot my Fitbit scale?

If you have issues with your Fitbit scale, see one of the articles below for more information:

Last updated: November 6, 2019
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