Treadmill Distance Calibrator - Match Watch to Treadmill Belt
Treadmill said 10.00 km but Garmin only recorded 8.4 km? Linearly rescale all speed and distance points while preserving heart rate and cadence.
How to Use Treadmill Calibrator in 3 Simple Steps
Step 1: Upload
Drag & drop your .FIT, .GPX, or .TCX activity file. All processing is 100% private in your browser.
Step 2: Process
FitCrop inspects telemetry streams, removes anomalies, recalibrates metrics, or fixes binary checksums.
Step 3: Export
Download your clean Strava, Garmin, and Zwift compatible file with 1 click. Zero server wait.
Frequently Asked Questions
Why does my watch record less distance on a treadmill?
Wrist accelerometers estimate distance by multiplying arm swing frequency by an assumed stride length, which often undercounts compared to the motorized treadmill belt.
Does calibrating treadmill distance preserve heart rate?
Yes, FitCrop rescales speed and distance trackpoint values while leaving 100% of your biometric heart rate, cadence, and timestamps intact.