Charge 5 is not tracking my distance accurately

[HuyLuu]

I just upgraded my Fitbit from Charge 3 to Charge 5. I ran on the treadmill for more than 5500 steps but it only showed 2.19 miles for the distance. The Charge 3 displaced about 3.1 miles for the similar amount of steps.

please let me know if I can adjust it.

Moderator Edit: Clarified subject

[MarreFitbit]

Hi there, @HuyLuu. Thanks for stopping by in the Fitbit Community Forums and sharing the details about the inconvenience with your Charge 5. I understand how important is to you to get your data accurately.

Fitbit devices use the formula below to calculate distance. Your stride length is determined by your height and sex. Steps x Stride Length = Distance Traveled

Please note when you track an activity with GPS, your device calculates your distance using GPS data rather than steps. If you begin moving before you get a GPS signal, your device calculates distance using your steps until GPS connects.

To update your stride length, track a run with GPS or measure your stride length manually. For more information, see Can I change my stride length in my Fitbit account?

For more information about GPS, see How do I use GPS on my Fitbit device?

[HuyLuu]

Thanks.