Updated · Built and checked by the PlinzoTools team, formulas tested against published sources
Convert pixels to inches at any DPI, with cm/mm/pt/pica equivalents.
10 in
A pixel doesn't have a fixed physical size -- how many inches a given pixel count spans depends entirely on the resolution (DPI, dots per inch) it's being rendered or printed at. This tool converts a pixel measurement into inches at your chosen DPI, and shows the equivalent size in centimeters, millimeters, points, picas, meters, and feet at the same time.
Enter your pixel value, then select a DPI from the dropdown (72 for legacy web/screen assumptions, 96 -- the modern default -- for standard screen resolution, 150 for draft print, 300 for high-quality print) or choose "Custom" to enter your own DPI value.
Inches = Pixels ÷ DPI
DPI (dots per inch) defines how many pixels fit into one physical inch -- dividing your pixel count by that figure gives the resulting physical size. A higher DPI packs more pixels into the same physical inch, so the same pixel count produces a smaller physical size at a higher DPI.
The identical 960 pixels produces three very different physical sizes -- which is exactly why "how big is this image" has no single answer without also specifying a DPI.
| DPI | Typical Use |
|---|---|
| 72 | Legacy web/screen assumption (historical Mac default) |
| 96 | Modern standard screen resolution (most Windows displays) |
| 150 | Draft-quality print |
| 300 | Standard high-quality print (photos, documents) |
| 600+ | Professional/fine-art print, some scanning |
Designers checking whether an image has enough resolution to print at a target physical size without appearing pixelated. Developers converting a design file's pixel dimensions into real-world print specs for packaging or merchandise.
DPI is a rendering/print assumption, not a property of the pixel data itself -- the same image file can be printed or displayed at any DPI, producing a different physical size each time. There's no universally "correct" DPI; it depends entirely on your intended output.
Say a photo is 3000 pixels wide and you want to know how large it can print. At 300 DPI, 3000 ÷ 300 = 10 in, so it supports a crisp 10-inch width. At 150 DPI the same file gives 20 in, but with visibly less sharpness up close. At 96 DPI it would be 31.25 in, which is closer to how the file would appear on a screen than a printed piece. These figures are hypothetical, but the method applies to any image.
Another example: a 1920 × 1080 screen graphic at 96 DPI is 20 × 11.25 in. Printed at 300 DPI, the same pixels give only 6.4 × 3.6 in. That is a common surprise when someone tries to print a screenshot at poster size.
The first mistake is using the file's stored DPI tag as if it were a physical property. Many image editors show a resolution value such as 72 PPI in the file metadata, but that number is only a suggestion; changing it does not add or remove pixels. What matters for print quality is the pixel count divided by the print size you actually want.
Second, mixing up screen pixels and CSS pixels. Modern phones and laptops often display several device pixels per CSS pixel, so a design measured in CSS pixels may look much smaller on the physical screen than the 96 DPI assumption suggests. This calculator uses the DPI you choose and does not detect your device.
Third, calculating only one dimension. Do the width and the height separately, then confirm both fit your target size and aspect ratio. If the aspect ratios differ, one side will need cropping.
The formula assumes square pixels, which is true of almost all modern images and displays. It also assumes that the stated DPI is what you will use for output. If you enter a custom DPI of 0 or leave the field empty, the tool has no meaningful result to show. Very low DPI values can produce huge inch figures that do not represent a realistic print job.
For photos held at arm's length, 300 DPI is the usual target. Large items viewed from a distance, like banners and billboards, are printed at far lower DPI because the viewer is not close. If you are unsure, ask the printer for their recommended resolution for the product, since they know their equipment.
300 DPI is the standard for high-quality print output (photos, brochures, documents); lower values like 150 are acceptable for less critical draft prints, and higher values are used for fine-art or professional photo printing.
Because inches depend on both pixel count and DPI together -- pixels alone don't have a fixed physical size until you specify how many of them fit per inch.
72 DPI was a historical default tied to old Macintosh displays; 96 DPI became the modern standard for most Windows-based screens. Neither is "correct" for print -- both are legacy screen-resolution assumptions.
At 96 DPI it is 20 inches; at 300 DPI it is 6.4 inches. The answer always depends on the DPI.
Only if you let the editor resample the image. If resampling is off, the pixels stay the same and only the intended print size changes.
Strictly, PPI describes pixels on screen or in a file, and DPI describes printer dots. In everyday use people treat them as interchangeable, and this tool uses the number the same way for both.
You can, but it will look soft or pixelated because there are too few pixels per inch. Use the calculator to see the effective DPI before you commit.
Reference: NIST Weights and Measures