Fitbit trackers calculate distance by multiplying your walking steps by your walking stride length and multiplying your running steps by your running stride length. By default, we calculate your stride length using your height and gender. If you have a Fitbit Blaze or Fitbit Charge 2 and track one or more runs using connected GPS, or if you have a Fitbit Surge and track one or more runs using built-in GPS, we evaluate that data to automatically update your running stride length.
If your distance measurement seems inaccurate, follow the steps below to calculate your stride length and then add it to your Fitbit account.
Calculating your stride length
To measure your walking stride length:
- Go to a track or some place where you're sure of the distance.
- Count your steps as you walk across that distance, making sure you travel at least 20 steps.
- Divide the total distance (in feet) taken by the number of steps to get your stride length.
Your running stride can be calculated the same way if you run instead of walk.
Changing the default stride length on your Fitbit account
To adjust your stride lengths using the Fitbit app, go to Account and find the Stride Length setting.
To adjust your stride lengths using the fitbit.com dashboard, click the gear icon in the top right and go to Settings > Personal Info. The stride length fields are in the Body Info section. If you use the Fitbit mobile app, go into the app and turn off Set Automatically under the Stride Length setting.
The changes take effect after you sync your tracker.