Hello @Nicki-noo, good to see you in our community. The difference in distance with your tracker is that will calculate distance by multiplying your walking steps and walking stride length. Similarly, your running steps are multiplied by your running stride length. This will not necessarily match a pre-measured distance, nor will it show exactly what a GPS device will show. To improve the distance on your Fitbit account you can always use a customize settings. If you want to enter your personal measurements, one user of the community @kaz181 shared the article to do this in the following post: How to measure my stride lenght.
Hope this helps and keep me posted how it goes.
Roberto | Community Moderator"Great things are done by a series of small things brought together.” What's Cooking?
Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
Best Answer