How to directly set the coordinates of Pivot Point in Sprite Editor?

I have a large number of sprites and I want the pivot point for all of them to be at the same coordinates i.e not necessarily at the center but at some other custom coordinates but those coordinates should be same for all the sprites. I can't find an easy way to do this. The only thing that comes to my mind now is to calculate the coordinates of pivot point manually using the X,Y,H,W values given in the small window in the sprite editor. But that will take a lot of time. I want an easy way such that if I calculate X,Y coordinates for one sprite I can simply enter those values for other sprites as well.