Convert millimeters to pixels at your chosen DPI. Enter dimensions and DPI to get the pixel count instantly.

In precision design work, dimensions are often specified in millimeters. To prepare digital images, you need to convert mm to pixels at the target DPI: pixels = mm × DPI / 25.4.
This conversion is essential for packaging design, label printing, product photography, and any work requiring precise mm-to-pixel mapping.
At 300 DPI: 1 mm = 11.81 pixels, 85 mm (business card width) = 1,004 pixels.
All calculations run locally in your browser — nothing is sent to any server.
The formula is: pixels = mm × DPI / 25.4. Since 1 inch = 25.4 mm exactly.
At 300 DPI: 1 mm = 11.811 pixels. At 600 DPI: 1 mm = 23.622 pixels.
For bleed area: add 3 mm (standard) to each edge. A 100 × 50 mm design with 3 mm bleed = 106 × 56 mm = 1,252 × 661 px at 300 DPI.
| Feature | 300 DPI | 600 DPI |
|---|---|---|
| 1 mm | 11.81 px | 23.62 px |
| 10 mm | 118 px | 236 px |
| 85 mm (card) | 1,004 px | 2,008 px |
| Use case | Standard print | Fine art / medical |
| File size | Standard | 4× larger |

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