There is no well it goes onto the ground that is why I said it was 50" off the floor or ground sorry, so there is no well. The base of the window was level with the ground.

To be honest I did not look at that with the ventilation and natural light. So I dont have the exact square footage of the room to figure it out.

The room was about 12x12 and the window was 42 wide slider and 32 high.