When I did a carat weight calculation from this website
http://www.dendritics.com/scales/carat-weight.asp
I got 1.13 Ct. I used a height of 60%. I have used this before and it seems like the estimates are usually low compared to the finished weight of the gems I cut. I am not sure if this is because precision cutters usually cut at a little different angles or what though. I hope that helps.