NRMSE (Normalized Root Mean Square Error)
The Normalized Root Mean Square Error (NRMSE) the RMSE facilitates the comparison between models with different scales. the normalised RMSE (NRMSE) which relates the RMSE to the observed range of the variable. Thus, the NRMSE can be interpreted as a fraction of the overall range that is typically resolved by the model.
where Obar is the average of observation value and you can find the formula of RMSE by click on it.
Paste 2-columns data here (obs vs. sim). In format of excel, text, etc. Separate it with space:
Normalized Root Mean Square Error: