The new calculator layout is giving me a few problems.

I am trying to convert a sens of 3 in overwatch to a sens in r6 at 800 dpi. I get the default results of 50 sens which I know isn't right.

You are probably getting 50 and another number, not just 50? The config file sensitivity is the sum of both numbers. If you don't want to mess around in the config file, select In-game as location instead.