Bike Ride Distance Not Accurate

[AntonD]

I’m using iphone latest IOS with charge 3. I start and finish bike ride in excercise. Shows route and time correctly but distance is approximately half of actual distance ridden. Happens consistently. Phone within 1/2 meter of Fitbit  

Moderator Edit: Clarified subject

[LucioFitbit]

Hi there @RuthMargaret, it's great to see you around in the Community.

Thank you for the information shared. Fitbit devices calculate distance based on the device’s accelerometer data and stride length setting. Default stride length is based on your height and gender. If available, Fitbit devices use GPS data to calculate more precise distances. When you sync your device, our algorithm interprets the data from the device, and you see your distance traveled in the Fitbit app. 

Note that when you track an exercise with GPS, both GPS and accelerometer data are used to calculate the distance shown in the Fitbit app. 

I'd recommend you check these articles, How does my Fitbit device calculate my daily activity? and How accurate are Fitbit devices?

Also you can try to restart your device.

I'll be around.