What is a mm to px converter?

Millimeter to Pixel Converter is a free online tool that is easy to use. It helps you convert millimeter values into pixels. So, if you work for a website, print media, or measure physical dimensions, this tool is very helpful.

How to use Mm to Px Converter?

Here are three easy steps to use this tool and get benefits. These are:

Step 1: Set the Pixels Per Inch(PPI) value first.

Step 2: After this, input the mm value you want to convert into pixels.

Step 3: Press the convert button, and you will get your results instantly in Px.

Furthermore, you can also try pixels to millimeters & pixels to feet as well.

Mm to Px Conversion Table

Below are the common millimeter-to-pixel conversions that are mainly used in different fields. Moreover, the default value of PPI is set to 96 for all conversions. You can also see your results directly from this table if your desired value is available.

MM	PX
5	18.9
7.5	28.35
10	37.8
12.5	47.24
15	56.69
17.5	66.14
20	75.59
22.5	85.04
25	94.49
27.5	103.94
30	113.39
32.5	122.84
35	132.28
37.5	141.73
40	151.18
42.5	160.63
45	170.08
47.5	179.53
50	188.98
52.5	198.43
55	207.87
57.5	217.32
60	226.77
62.5	236.22
65	245.67
67.5	255.12
70	264.57
72.5	274.01
75	283.46
77.5	292.91
80	302.36
82.5	311.81
85	321.26
87.5	330.71
90	340.16
92.5	349.61
95	359.06
97.5	368.51
100	377.95
150	566.93
200	755.91
250	944.88
300	1133.86
400	1511.81
500	1889.76

How to Convert Millimeters to Pixels- Formula Explained

You might have checked other calculators that are available in the previous articles. Moreover, the relationship between pixels with cm and mm has also been discussed. So, let’s have a quick recap of this derivation and originate a mm to px formula:

As you know:

1 inch = 2.54cm(standard conversion)

So, to convert it into millimeters, we have to multiply it by 10 because there is 10mm in 1 cm

1in = 2.54cm x 10

1in = 25.4mm

And if there are 96px in 1 Inch(default PPI value is 96) then,

96px = 25.4mm

So, for 1 mm, it will become:

1mm = 96px / 25.4

Millimeters to Pixels Formula:

pixels = millimeters * ( PPI / 25.4 )

Example: 

If we want to convert 10 millimeters into pixels, then it will become:

Px = 10 * (96/25.4)

Px =  38px (approx)

Examples Of How Millimeters Works

Below are few working examples of how millimeters works:

Example 1: Precise Print-Based Ruler/Guide Lines (Unique Print Use)

Scenario: You’re generating a printable document (like a ruler or a grid overlay) where millimeter-level precision is essential for accurate physical measurements.

CSS:

@media print {
  .ruler-line {
    height: 0.1mm; /* Very thin line */
    width: 100mm; /* 10-centimeter ruler section */
    background-color: black;
    margin-bottom: 10mm; /* 1-centimeter increments */
  }

  .page {
    width: 210mm; /* A4 width */
    height: 297mm; /* A4 height */
  }
}

Explanation: In this highly specific print context, millimeters are used to create precise ruler lines or grid elements. The small increments allow for very accurate physical measurements in the printed output. This is a unique use case where the precision of millimeters is valuable.

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Example 2: Print-Based Product Labels with Exact Dimensions (Unique Print Use)

Scenario: You’re styling print templates for product labels where the label size is critical for fitting on packaging.

CSS:

@media print {
  .label {
    width: 50mm;
    height: 30mm;
    border: 1mm solid black;
    font-size: 10pt; /* Points are often still used in print */
  }
}

Explanation: Here, millimeters ensure that the printed label matches the exact dimensions required for the physical product packaging. This is a unique print-specific scenario where the precision of millimeters is necessary.