How Do I Calibrate the Accelerometer on a Garmin Watch?

Some Garmin watches feature an accelerometer that can provide speed and distance indoors or when a GPS signal is lost.

Watches are pre-calibrated with a table of default values based on the averages of many runners and the calibration is refined every time the watch is used outdoors with GPS. In addition to the built in table, the watch will also adapt during its use to provide the best possible speed and distance when GPS is unavailable.

The more frequently the watch is used in an activity with a GPS signal, the speed and distance received will be more accurate when doing an activity indoors or if the GPS signal is lost. It is not possible to manually calibrate this value; It can only be done automatically by the watch.

As a result of the individual calibration process, the watch may provide inaccurate speed and distance values if it is being used between multiple users.