Convert pixels to centimeters at 72, 96, 150, or 300 DPI.
Reference table at 96 DPI
| Pixels | Centimeters | Millimeters | Inches |
|---|---|---|---|
| 100 px | 2.65 cm | 26.46 mm | 1.04 in |
| 500 px | 13.23 cm | 132.29 mm | 5.21 in |
| 1000 px | 26.46 cm | 264.58 mm | 10.42 in |
| 1920 px | 50.80 cm | 508.00 mm | 20.00 in |
How it works
What is DPI?
DPI stands for dots per inch — the number of pixels packed into one inch of physical surface. A screen set at 96 DPI shows 96 pixels across every inch; a print file at 300 DPI prints 300 ink dots per inch. Higher DPI means smaller physical size for the same pixel dimension.
How to convert pixels to centimeters
Use the formula cm = px ÷ DPI × 2.54. Divide the pixel count by the DPI value to get inches, then multiply by 2.54 because one inch equals 2.54 cm. Example: 300 px at 96 DPI = 300 ÷ 96 × 2.54 = 7.94 cm.
Which DPI should I pick?
Use 96 DPI for on-screen design — it matches the CSS pixel reference on most desktop monitors. Pick 72 DPI for legacy macOS files. For print, 150 DPI works for draft output and 300 DPI is the standard for high-quality printing (magazines, brochures, photos).
Why does the same pixel size look different on my phone and monitor?
Physical pixel density differs per device. Retina and OLED phones pack 400+ pixels per inch, while a 24-inch 1080p monitor sits near 92 DPI. The converter assumes a reference DPI for the output medium; on a high-density phone the actual physical size will be smaller than calculated at 96 DPI.
How do I convert centimeters back to pixels?
Reverse the formula: px = cm × DPI ÷ 2.54. For 10 cm at 96 DPI, that is 10 × 96 ÷ 2.54 ≈ 378 px. Useful when sizing a print asset in centimeters and you need the exact pixel dimensions for export.
Does the DPI written inside a JPG or PNG matter?
The DPI metadata in an image file is just a tag that print software reads to decide the default physical size when you import the file. The actual pixel data is the same regardless of DPI. When you open a 1920×1080 photo at 72 DPI vs 300 DPI, the pixels are identical — only the suggested paper size changes. Resampling changes the pixel count; retagging DPI does not.
What DPI do CSS pixels use?
CSS uses a reference pixel of 1/96 inch, meaning CSS assumes 96 DPI by default. Modern devices scale this through device pixel ratio (DPR). An iPhone with DPR 3 renders one CSS pixel as 3 physical pixels, keeping the logical 96 DPI reference while the screen still looks sharp. For design-to-print calculations, 96 DPI is the safe assumption.
How accurate is this converter for real-world print?
The math is exact — 1 inch always equals 2.54 cm. Accuracy in practice depends on choosing the right DPI for the target output. A press proof at 300 DPI and a laser draft at 150 DPI will differ in physical size for the same pixel count. Always match the calculator DPI to the DPI declared in your export settings or print job.
Convert any pixel value to centimeters, millimeters, and inches using the DPI (dots per inch) of your output medium. Select 72, 96 (screen standard), 150, 300 DPI or enter a custom value — the calculator applies cm = px × 2.54 ÷ DPI and shows the physical size instantly. Designers use it to verify the printed dimensions of screen elements before sending a file to press, and to size banners, logos, or photos for brochures and posters. Example: 1920 px at 96 DPI prints at 50.80 cm wide — the width of an HD screen rendered full size. A 300 px icon exported at 72 DPI measures 10.58 cm on paper, useful for check-printing app assets. A reference table covers 100, 500, 1000, and 1920 px at the standard screen DPI, plus a copy-to-clipboard button for the centimeter result.