How to Convert Paper Sizes to Pixels for Screen and Print

https://zoom-wiki.win/index.php/How_to_Convert_Paper_Sizes_to_Pixels_for_Screen_and_Print

When designing for both screen and print, figuring out the right pixel size for a paper format like A4 can be a headache. The trick is understanding your target DPI—72 for web, 300 for high-quality print. Multiply the paper's inches by your DPI to get width and height in pixels. For example, a 8.5 x 11 inch letter at 300 DPI becomes 2550 x 3300 pixels, giving you a crisp, accurate file whether it's for a poster or digital mockup.