Convert GPX to FIT
Turn a recorded GPX track into a FIT activity. Pick the activity type first, since GPX does not record it in a standard way.
or drop it anywhere in this box
What the FIT file contains
- One record per track point: time, position, elevation, and heart rate, cadence, temperature and power where the GPX has them.
- Distance, calculated point to point from the positions, because GPX does not store it.
- One lap and one session covering the whole track, with totals and averages.
This makes an activity, not a course
The output is a record of something that happened. That needs a time on every point. A route drawn in a planner has positions but no times, and the tool will refuse it with that explanation. It does not write FIT course files for following a route on a device.
Speed is not written per point; software that needs it derives it from distance and time. Pauses are not detected, so moving time equals elapsed time.
Going the other way is FIT to GPX.