freeware/shareware app that can do this? (1 Viewer)

I was wondering if there was a freeware or shareware application that would let you do this:

a. Enter the stats on your camera, lens and any settings the software would need to do calculations
b. Input the dimensions of the subject (hight and width) you will be shooting
c. Input the percentage of the subject you want to fill your photo
d. Input the distance you are to the subject

The software would then compute zoom in mm or zoom x format or both

Another nice feature would be if you could turn zoom input off and the software would tell you how far you would have to take the shot from.

Is there any freeware or shareware out there that does this?

(I did a search first but found too many results. Sorry if this has already been posted.)

Thanks!