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I am creating business card maker online, now so far everything was easy until i came to card rendering. In my html document i have:
width = 517px which is equals to 90mm
height = 287px which is equals to 50mm
And according to Photoshop 90mm -> 255px so I need to somehow convert 517px to 255px.
After some googling best solution i came up with so far is (517 / 5.7) * 3 which gives me 272 and it’s far from correct answer.
Any suggestions would help a lot 🙂
P.S I am using php GD.
The correlation between pixels and physical measurements depends entirely on the display and how many physical pixels there are per (square) millimeter. 72ppi (pixels per inch) used to be a typical resolution, but with pixel density increasing across many devices, that’s not a given anymore.
There’s simply no standard formula.