When to use Pixel to CM & Inch Converter
Convert between pixels, centimetres, millimetres and inches for any DPI. Plan an image size before you resize it.
The best image settings depend on where the picture will be used. Pixel dimensions describe width and height; file size describes bytes. Changing one does not guarantee a particular value for the other. Keep the original, compare the result at its intended size, and choose a format accepted by the destination.