formula Monitor Match Formula

[potato psoas]

Does anyone know the formula for matching monitor distance (2D to 3D preferably)?

I managed to figure out 0% and 100% but I'm stumped at how I can make it a function that takes monitor match as well as FOV as an input.

I'm thinking I can find it by doing trig with this diagram:

but the formulas I come up with are always just a little bit off from what the calculator says.

@DPI Wizard

[Drimzi]

Edited January 28, 2018 by Drimzi

[potato psoas]

[Drimzi]

Edited January 28, 2018 by Drimzi