You can view what it will look like in your room using excel.

Step 1 - copy a picture of the room using the windows snipping tool

Step 2 - paste the picture into excel and add a freeform shape where you want the rug (click where you want it to start and then at each corner going around furniture until you have reached your starting point)

Step 3 - go back to the internet and snip a picture of the rug and press copy

Step 4 - return to excel - right click on the shape and select format shape

Step 5

Select Fill - Picture or texture fill - and Clipboard

End result