Welcome to the implementation of the E-model as defined in the following ITU-T Recommendations
The original version of the calculation tools was kindly offered by x-fabric.com in 2003. This page was last updated in June 2019.
It gives you the opportunity to make online E-model calculations and to obtain the R value as the result.
This implementation is easy to use and tooltips provide useful hints. Users are encouraged to read the ITU-T Recommendations mentioned above.