I was wondering if anyone knows of an equation that, given any width and height area, as well as a fontname, returns the appropiate size of a font to fill that area the best (I know it won't be perfect). Let's say I have a rectangle of 200w x 100h pixels, I want to fill it with the word 'Hello', I would need to set the fontsize to 66 if the font is Arial, so... how do I get that 66? Is there any equation I can use (I know I can do a loop thru all font sizes until I get the desired (best fit) size, but I want to use that iteration as a last workaround

TIA