How many pixels equal 25.4 mm (1 inch)?

96 pixels = 25.4 mm at 96 DPI (web standard). So conversely, 1 mm ≈ 0.265 px.

My web layout is 800px wide. What's that in millimeters?

800 px × 0.265 ≈ 212 mm (about 21.2 cm). Typical desktop content width equals a metric A4 page width.

I need to convert a web screenshot to metric specifications for print.

Use this converter with 96 DPI. Example: 640px = 169.6 mm. Verify final print output in your image editor.

Does the conversion change on high-DPI (Retina) screens?

In CSS, no—browsers use 96 DPI. But physical pixels double on 2x Retina. For image assets, use 192 DPI: 192 px = 50.8 mm.

Pixel to Millimeter Converter

Enter a value to instantly convert between typography units.

From

Precision4 dp

1 Pixel = 0.2646 Millimeter

Key Formulas

Point → Pica

pc = pt × 0.0833333

Point → Inch

in = pt × 0.0138889

Pica → Inch

in = pc × 0.166667

Pixels are screen units; millimeters are metric physical measurements. At standard web DPI (96 pixels per inch = 25.4 mm per inch), 1 pixel equals approximately 0.265 millimeters. This conversion is crucial for international teams translating web layouts to metric print specifications.

Last reviewed: 2026-06-11 · see our methodology

Frequently Asked Questions

Real-World Examples

96 px = 25.4 mm (1 inch). Web standard reference point; full inch width in responsive design.

96 px = 25.4 mm

48 px = 12.7 mm. Half-inch (approximately 1.3 cm) web spacing; converts to reasonable metric margin.

48 px = 12.7 mm

192 px = 50.8 mm (about 5 cm). Large web spacing equals substantial metric measurement for print.

192 px = 50.8 mm

100 px ≈ 26.5 mm. Common button width or icon size in web design; scales to metric specs.

100 px = 26.458 mm

points to picas points to type inches picas to type inches points to mm pixels to points ems to rems

Pixel to Millimeter Converter

Key Formulas

Frequently Asked Questions

Real-World Examples

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