FREE WEB TOOL

Pixels to print size calculator

Convert pixel dimensions and DPI into physical print size in millimetres and inches.

Use tool

Width pxHeight pxDPI

🔒 Inputs are processed locally in your browser.

Result

How to use this tool

Convert pixel dimensions and DPI into physical print size in millimetres and inches.

Set Width px, Height px, DPI.
Use Calculate to process the input.
Compare the result with your source data and return to the input to make corrections.

Input and settings example

Width px: 2480
Height px: 3508
DPI: 300

The same image prints at different sizes depending on DPI

A 2480 × 3508 px image is approximately A4 at 300 DPI. At 600 DPI, the same image prints at roughly half the width and height.

This tool starts from the pixel dimensions you already have and calculates the physical size available at the selected DPI.

Actual pixels and finished size are more informative than a DPI metadata field alone

JPEG and PNG files can contain resolution metadata, but that number by itself does not define image quality. The important relationship is the actual width × height in pixels versus the intended physical print size.

To work in the other direction, use the fixed 300 DPI, 350 DPI, or 600 DPI calculators.

The calculated size is not a guarantee that the image will look good

The result tells you the size that preserves the selected pixel density. It does not detect blur, JPEG artifacts, AI-generated detail problems, or poor focus.

Check the image itself at 100% and follow the printer’s recommended or minimum DPI when one is provided.

Lower DPI allows a larger print, but trades away pixel density

With the same pixel count, lowering DPI increases the physical size. That also reduces the number of pixels available per inch.

Choose the value based on viewing distance, use case, and the destination specification rather than lowering DPI only to make the number larger.

Go one level deeper

Understand image resolution, DPI, and print size →