Pixels to Print Size Calculator: How large will your image print?

If you know an image's pixel width and height and need to plan its place on a printed page, choose a resolution in pixels per inch (PPI). Pixel width ÷ PPI gives the width in inches; pixel height ÷ PPI gives the height in inches. Adobe explains the relationship between pixels, PPI, and print size.

Enter those values below to see the full image's width × height in inches, centimeters, and millimeters.

Pixels per inch, often called DPI in print settings.

How to use this calculator

  1. Find the image's actual pixel width and height in its file properties or image editor. Enter whole numbers without commas. The faint numbers in the fields are examples, not detected dimensions.
  2. Choose the PPI requested for your print job. The field starts at 300 PPI; change it if your job calls for another value.
  3. Select Calculate print size. Each result shows width × height for the full image. Compare it with the space available in your layout.

Why PPI changes print size

At a fixed pixel count, a higher PPI puts the image into fewer inches. A lower PPI spreads it across more inches. Changing the assigned print resolution alone keeps the pixel count fixed, as Adobe explains.

The same image at two resolutions

A 3,600 × 2,400 pixel image works out to 12 × 8 inches at 300 PPI. At 150 PPI, the same image works out to 24 × 16 inches. Neither calculation changes the image file.

The metric results describe the same size. One inch is exactly 2.54 centimeters or 25.4 millimeters, as NIST defines.

PPI, DPI, and the 300 starting value

PPI describes how many image pixels fit in an inch of the finished print. DPI describes printer dots per inch. Print instructions sometimes call image resolution DPI, but this calculator uses image PPI. Adobe explains the distinction.

The field starts at 300 PPI because it is common for smaller prints viewed up close. Lower densities can work for larger prints viewed from farther away, as Adobe's print guidance explains. Use the value specified for your print job. In its paperback and hardcover formatting guidance, KDP recommends images of at least 300 DPI.

Use the size in your layout

The result describes the full image before any crop, bleed, or margin adjustment. Placing it at a different size changes its effective PPI. Entering a new PPI here changes only the calculation; it does not change the image file.

This result cannot tell you whether the image will look sharp or whether a finished book file meets KDP's requirements. Use the KDP Image DPI Checker to inspect an image file at its intended placement. Use the KDP Book Setup Calculator to calculate book dimensions and pixel counts from book specifications.