Pixels and print resolution

The number of pixels and print resolution needs to be considered when determining if a file will support the print size that you want. The chart below will allow you to determine the pixel resolution required for various print sizes. Some think of resolution as dpi, which is not accurate.  A 1000 dpi file may produce only a modest-sized print, while a 72 dpi file can make a wall-size mural.

The only “true” measure of size is the “pixel resolution”, which is expressed as the number of pixels in the length times the width of the image.

You can determine the pixel resolution by “hovering” the cursor over the file name or by right-clicking and selecting “file info” or “properties”. Some file types will have to be opened using an image editor to see the pixel dimensions. Either way, it will be something like 3000 pixels x 4500 pixels. This description can be converted to various sizes at different output resolutions (see the chart below).

Photo and inkjet printing typically requires the pixels resolution to be between 150 and 360 dpi at output print size. However, limits in-camera sensor resolution may require special processing for optimum quality. We use special software to optimize files for maximum quality. Please let us handle this if step because improperly re-sizing a file can actually decrease the quality of the final print.  If your file’s pixel resolution appears in or is lower than that specified in the “pink” column below, please check with us before ordering.