Watch accuracy on treadmill is horrible. Calibration does not fix it. Why can't just adjust distance on watch to match treadmill to fix it like other apps?

Hi Korey164,

Thanks for using Apple Support Communities. We understand you have some concerns about the accuracy of workout data when using a treadmill. We're happy to share some information to help.

Its sounds like you may have already worked through calibrating your Apple Watch, but to ensure no steps are missed we recommend working through the steps below and testing for improvements:

1. Unpair your Apple Watch and iPhone: Unpair and erase your Apple Watch - Apple Support
2. Pair again: Set up and pair your Apple Watch with iPhone - Apple Support
3. Update the paired iPhone: Update your iPhone or iPad - Apple Support
4. Update the Apple Watch: Update your Apple Watch - Apple Support
5. Checkout tips to improve measurements here: Get the most accurate measurements using your Apple Watch - Apple Support
6. Calibration your Apple Watch & reset your calibration settings: Calibrating your Apple Watch for improved Workout and Activity accuracy - Apple Support

Thanks.