Millimeters to Pixels Converter

Convert physical measurements to digital pixels based on DPI/PPI settings

Conversion Formula

1 inch = 25.4 millimeters

1 inch = [DPI/PPI] pixels

px = mm × (DPI / 25.4)

DPI (Dots Per Inch) or PPI (Pixels Per Inch) determines how many pixels represent one inch in the digital space. Higher DPI means more pixels per physical unit.

Millimeters to Pixels Conversion Table

Common conversions at standard resolutions:

At 96 PPI (Standard Screen Resolution)

Millimeters (mm) Pixels (px)
1 mm3.78 px
5 mm18.90 px
10 mm37.80 px
20 mm75.59 px
50 mm188.98 px
100 mm377.95 px
210 mm (A4 width)793.70 px
297 mm (A4 height)1122.52 px

At 300 DPI (High Quality Print)

Millimeters (mm) Pixels (px)
1 mm11.81 px
5 mm59.06 px
10 mm118.11 px
20 mm236.22 px
50 mm590.55 px
100 mm1181.10 px

About Millimeters to Pixels Conversion

Converting millimeters to pixels is essential when translating physical dimensions to digital displays or print media. This conversion depends on the resolution (DPI/PPI) of the target medium.

How to Convert mm to px

To convert millimeters to pixels:

  1. Determine the DPI/PPI of your target medium (screen or print)
  2. Multiply the millimeter value by the DPI/PPI
  3. Divide the result by 25.4 (millimeters in one inch)
  4. The result is the equivalent measurement in pixels

Example: Convert 10mm to pixels at 300 DPI

(10 × 300) / 25.4 = 118.11 px

Understanding DPI vs PPI

DPI (Dots Per Inch): Used primarily for print, refers to the number of ink dots a printer can place in one inch.

PPI (Pixels Per Inch): Used for digital displays, refers to the number of pixels a screen displays in one inch.

For practical purposes in digital design, they can be treated the same when converting measurements.

Common DPI/PPI Settings

Applications of mm to px Conversion

This conversion is particularly important for: