Screen & Design Conversion: 1 mm ≈ 3.7795 pixels (96 DPI) | Essential for web/graphic design and UI development
Precise conversion between millimeters (mm) and pixels (px) with customizable DPI (dots per inch) settings. Perfect for web design, graphic design, print media, and UI/UX layout planning.
Conversion Formula
Pixels = Millimeters × (DPI / 25.4) | Millimeters = Pixels × (25.4 / DPI)
Precision: 2 Decimal Places | Formula: px = mm × (96 / 25.4)
Understanding these essential units for screen design, print media, and digital layout planning.
Millimeter to Pixel (X) Conversion
Based on DPI (Dots Per Inch):
1 inch = 25.4 millimeters
Pixels (px) = Millimeters (mm) × (DPI / 25.4)
Millimeters (mm) = Pixels (px) × (25.4 / DPI)
At 96 DPI: 1 mm ≈ 3.7795 px
Convert 10 millimeters to pixels:
px = mm × (DPI / 25.4)
px = 10 × (96 / 25.4)
px = 10 × 3.7795275591
px ≈ 37.80 (with 2 decimal places)
Convert 100 pixels to millimeters:
mm = px × (25.4 / DPI)
mm = 100 × (25.4 / 300)
mm = 100 × 0.0846666667
mm ≈ 8.47 (with 2 decimal places)
Note: DPI directly impacts conversion results - higher DPI = more pixels per millimeter
A metric unit of length equal to one-thousandth of a meter (0.03937 inches). It's a standard physical measurement used worldwide for tangible objects and print media.
Equivalents:
Note: Metric system standard for physical length measurements
A digital unit of display resolution, representing the smallest addressable element in a digital image or screen. Pixel (X) refers to the horizontal (width) pixel dimension (Pixel Y = vertical).
Equivalents (by DPI):
Note: Pixels are digital (not physical) - size depends on screen DPI/resolution
| DPI Setting | 1 mm = Pixels (px) | 1 px = Millimeters (mm) | Common Use Case |
|---|---|---|---|
| 72 DPI | ~2.8346 px | ~0.3528 mm | Basic print, web graphics (legacy) |
| 96 DPI | ~3.7795 px | ~0.2646 mm | Computer screens, web design, UI/UX |
| 150 DPI | ~5.9055 px | ~0.1694 mm | High-res screens, digital brochures |
| 300 DPI | ~11.8110 px | ~0.0847 mm | Professional print, photos, flyers |
| 600 DPI | ~23.6220 px | ~0.0423 mm | Ultra-high-res print, fine art |
Common questions about millimeters, pixels, and DPI conversion for design & development.
DPI (Dots Per Inch) represents the density of pixels (or dots) in one physical inch of a screen or print medium. Since 1 inch = 25.4 millimeters, DPI directly determines how many pixels fit into a millimeter:
Pixels per millimeter = DPI / 25.4
Example: 96 DPI (screen) → 96 / 25.4 ≈ 3.78 pixels per mm
Example: 300 DPI (print) → 300 / 25.4 ≈ 11.81 pixels per mm
Higher DPI means more pixels are packed into the same physical millimeter, resulting in a higher pixel count for the same mm length. This is critical for ensuring digital designs match physical print sizes.
Pixel X and Pixel Y refer to the horizontal and vertical dimensions of digital elements, respectively:
This converter focuses on Pixel X (horizontal), but the results can be used interchangeably for Pixel Y (vertical) with the same DPI setting.
The optimal DPI setting depends on your project's medium (screen vs print):
This converter lets you switch between common DPI values to match your specific project needs.
Yes! This converter is highly useful for responsive web design, especially when translating physical design mockups (in mm) to digital pixel dimensions:
For example, a 50mm wide button on a physical mockup will be ~189px wide at 96 DPI (50 × 3.7795), which you can directly implement in your CSS.
No, the physical size of a pixel varies significantly across devices, even if the pixel count is the same. This is due to differences in DPI (screen density):
This is why millimeter to pixel conversion is critical - it bridges the gap between digital pixel dimensions and physical screen/print sizes, ensuring your designs look as intended across all devices.
Common design measurements for web, UI, and basic screen layout planning.
| Millimeters (mm) | Pixels (X) (96 DPI) | Pixels (X) (300 DPI) | Inches (in) | Common Uses |
|---|---|---|---|---|
| 1 mm | 3.78 px | 11.81 px | 0.04 in | Icon details, small borders |
| 5 mm | 18.90 px | 59.06 px | 0.20 in | Small buttons, icon sizes |
| 10 mm | 37.80 px | 118.11 px | 0.39 in | Button widths, text blocks |
| 20 mm | 75.59 px | 236.22 px | 0.79 in | Input fields, card components |
| 50 mm | 188.98 px | 590.55 px | 1.97 in | Card widths, sidebar elements |
| 100 mm | 377.95 px | 1181.10 px | 3.94 in | Mobile screen widths, panels |
| 200 mm | 755.91 px | 2362.20 px | 7.87 in | Tablet screen widths, sections |
| 300 mm | 1133.86 px | 3543.31 px | 11.81 in | Desktop screen widths, layouts |
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Accurately convert pixels (px) to millimeters (mm) with our free online converter. Calculate pixel to mm for web design, printing, and graphic design with customizable precision and quick shortcuts.
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