Pixels to inches: how big will it print?
This pixels to inches converter divides a pixel count by a resolution to give a physical size. It answers the common question of how large a photo or graphic can be printed while staying sharp, and it also tells you what a pixel value means in CSS inches.
The formula
inches = pixels ÷ DPI
3000 px ÷ 300 = 10 in
1920 px ÷ 300 = 6.4 in
1080 px ÷ 300 = 3.6 inA 1920 × 1080 image, a common full HD frame, prints at 6.4 × 3.6 inches at 300 DPI. At the CSS reference of 96 DPI the same image measures 20 × 11.25 in.
Resolution and print size trade off
The pixel count is fixed; the DPI you choose decides how tightly those pixels are packed. A 4000 × 6000 photo prints at 13.3333 × 20 in at 300 DPI, or 16.6667 × 25 in at 240 DPI. Lower DPI means a larger print with less detail per inch, so try a few values to find the largest size that still meets your quality target.
DPI metadata does not add pixels
Image files can store a DPI value, and changing it (for example from 72 to 300) only changes the suggested print size. The image gains no detail. To get more pixels you need a higher-resolution original. Scaling up with the image resizer changes the pixel count but cannot invent detail that was never captured.
Checking a paper size
An A4 page scanned or rendered at 300 DPI is 2480 × 3508 px. Converting back gives 8.2667 × 11.6933 in, which matches A4's 210 × 297 mm; the length converter confirms the millimeters. Values are rounded to four decimal places, and the Significant digits setting can only shorten them further. The DPI must be between 1 and 2400.
Screens are different
At 96 DPI the result is in CSS inches, and a CSS inch is a reference unit rather than a ruler measurement on a real display. Phones and high-density monitors pack many more physical pixels into an inch, so a 96px element is rarely exactly one physical inch on screen. For planning print jobs from inch sizes, the inches to pixels converter works in the opposite direction.