I have a large weight difference when I weigh myself, why? Follow Be sure to weigh yourself on a flat, hard surface (wood or tile type). Please don’t weigh yourself on carpet or a rug. Was this article helpful? 0 out of 6 found this helpful Have more questions? Submit a request Return to top Related articles My body masses have not been transmitted to the application, why? How to pair my Web Coach The weight displayed on my scale seems inconsistent WEB COACH FIT - Instruction Manual How many smartphones can be synchronized with Terraillon scales? Comments 0 comments Article is closed for comments.