Garmin Footpod Web UI calibration tool Find your TCX files to upload by looking here: https://support.garmin.com/support/searchSupport/case.faces?caseId=%7B6e1aa610-6d25-11dc-6782-000000000000%7D Idea and algorithm graciously stolen from: http://fellrnr.com/wiki/Garmin_Foot_Pod_Calibration Look there for instructions!