How to Convert an Image to 300 DPI for Print (Free)

"Please send files at 300 DPI" is one of the most common requests from printers, publishers and print-on-demand sites. It's also one of the most misunderstood.

DPI is a print instruction, not image quality

DPI (dots per inch) is a number stored in the file that tells a printer how many pixels to place in each inch of paper. Changing it doesn't add or remove pixels.

Print size = pixels ÷ DPI. A 3000 × 2400 px image prints at:

• 10 × 8 inches at 300 DPI
• 41.7 × 33.3 inches at 72 DPI

Same pixels, same quality on screen — different physical size on paper.

Case 1: You have enough pixels

If pixels ÷ 300 gives the print size you need, you just need to change the DPI value. Use the DPI changer, choose 300, and download. It also shows the resulting print size in inches for every file.

Case 2: You don't have enough pixels

If your image is 1200 px wide and you need a 10-inch print at 300 DPI, you need 3000 px. Changing DPI alone would make it print at 4 inches. Instead:

1. Enlarge it with the AI upscaler (2× or 3×) for real added detail.
2. Then set 300 DPI with the DPI changer.

For logos and flat graphics, converting to vector is even better — vectors print sharp at any size.

Quick reference

Batch DPI changes

Preparing a whole book or art portfolio? Drop all the files at once — every image gets 300 DPI and you download a ZIP.