Enter a value in pixels, set the DPI resolution, and read the result in millimeters. Check how large a camera file, a web image, or a Figma export would physically be once printed. The converter helps you pick the right dimension before sending a file to a print shop.
A pixel is a digital unit that describes a single point on a screen or in an image file. The millimeter, on the other hand, describes physical size — print shops specify business card, flyer, and bleed dimensions in millimeters. To convert one to the other, you need to know the DPI resolution: the number of pixels packed into one inch of material or screen.
This conversion is used most often by designers checking how large their project will physically be once printed, photographers judging whether a camera file is large enough for a specific format, and anyone working in Figma or Photoshop, who works in pixels but has to deliver a file with an exact physical dimension. The converter saves you from doing the math by hand and remembering the formula.
Further down this page you will find an extensive reference table for popular pixel values, a table running from the resolution of a finished file to the format on paper, and short guides on reading a file's real resolution in InDesign, Illustrator, Photoshop, PDF, Figma, CorelDRAW, Canva, Inkscape, Affinity, and EXIF data.
The whole conversion comes down to one formula, based on the fixed relationship between an inch and a millimeter: one inch is exactly 25.4 mm. So you just multiply the number of pixels by 25.4 and divide by your chosen DPI resolution.
The full formula is: millimeters = pixels × 25.4 ÷ DPI. The converter performs this calculation instantly, so you never have to do the math or hunt for a calculator.
Example: say you want to know how many millimeters 1,063 pixels are at a print resolution of 300 DPI. Plugging the values into the formula gives 1,063 × 25.4 ÷ 300, which is exactly 90 mm — exactly the width of a standard business card. The same 1,063 pixels displayed on a 96 DPI screen would take up 281 mm, because fewer points fit per inch. Screens always count by the 96 pixels per inch written into the CSS standard, which is why the same file measures differently there than in print.[1]
Starting a design from scratch with a size in millimeters? That direction belongs to the millimeters to pixels converter.
When the file is bound for an American print shop, the same measurement is quoted in inches: 2,550 pixels at 300 DPI is 8.5 inches, the width of a Letter sheet. The pixels to inches converter handles that.
Print shops and typesetting software state the size of the type itself in typographic points. One point is 0.3528 mm, so a 12-point type size occupies 4.23 mm. The pixels to points converter moves a mock-up measurement into that unit.
The table below shows how the same pixel values translate to millimeters at the five most commonly used resolutions. A few values match real formats exactly: 413 px at 300 DPI is the short edge of a passport photo, and 1,063 px is the width of a standard business card.
| Pixels | 72 DPI | 96 DPI | 150 DPI | 300 DPI | 600 DPI |
|---|---|---|---|---|---|
| 50 px | 17.64 mm | 13.23 mm | 8.47 mm | 4.23 mm | 2.12 mm |
| 90 px | 31.75 mm | 23.81 mm | 15.24 mm | 7.62 mm | 3.81 mm |
| 100 px | 35.28 mm | 26.46 mm | 16.93 mm | 8.47 mm | 4.23 mm |
| 150 px | 52.92 mm | 39.69 mm | 25.40 mm | 12.70 mm | 6.35 mm |
| 200 px | 70.56 mm | 52.92 mm | 33.87 mm | 16.93 mm | 8.47 mm |
| 250 px | 88.19 mm | 66.15 mm | 42.33 mm | 21.17 mm | 10.58 mm |
| 300 px | 105.83 mm | 79.38 mm | 50.80 mm | 25.40 mm | 12.70 mm |
| 400 px | 141.11 mm | 105.83 mm | 67.73 mm | 33.87 mm | 16.93 mm |
| 413 px | 145.70 mm | 109.27 mm | 69.93 mm | 34.97 mm | 17.48 mm |
| 500 px | 176.39 mm | 132.29 mm | 84.67 mm | 42.33 mm | 21.17 mm |
| 591 px | 208.49 mm | 156.37 mm | 100.08 mm | 50.04 mm | 25.02 mm |
| 600 px | 211.67 mm | 158.75 mm | 101.60 mm | 50.80 mm | 25.40 mm |
| 640 px | 225.78 mm | 169.33 mm | 108.37 mm | 54.19 mm | 27.09 mm |
| 720 px | 254.00 mm | 190.50 mm | 121.92 mm | 60.96 mm | 30.48 mm |
| 800 px | 282.22 mm | 211.67 mm | 135.47 mm | 67.73 mm | 33.87 mm |
| 827 px | 291.75 mm | 218.81 mm | 140.04 mm | 70.02 mm | 35.01 mm |
| 900 px | 317.50 mm | 238.13 mm | 152.40 mm | 76.20 mm | 38.10 mm |
| 1,000 px | 352.78 mm | 264.58 mm | 169.33 mm | 84.67 mm | 42.33 mm |
| 1,063 px | 375.00 mm | 281.25 mm | 180.00 mm | 90.00 mm | 45.00 mm |
| 1,080 px | 381.00 mm | 285.75 mm | 182.88 mm | 91.44 mm | 45.72 mm |
| 1,181 px | 416.63 mm | 312.47 mm | 199.98 mm | 99.99 mm | 50.00 mm |
| 1,200 px | 423.33 mm | 317.50 mm | 203.20 mm | 101.60 mm | 50.80 mm |
| 1,500 px | 529.17 mm | 396.88 mm | 254.00 mm | 127.00 mm | 63.50 mm |
| 1,920 px | 677.33 mm | 508.00 mm | 325.12 mm | 162.56 mm | 81.28 mm |
| 2,000 px | 705.56 mm | 529.17 mm | 338.67 mm | 169.33 mm | 84.67 mm |
| 2,048 px | 722.49 mm | 541.87 mm | 346.79 mm | 173.40 mm | 86.70 mm |
| 2,400 px | 846.67 mm | 635.00 mm | 406.40 mm | 203.20 mm | 101.60 mm |
| 2,480 px | 874.89 mm | 656.17 mm | 419.95 mm | 209.97 mm | 104.99 mm |
| 3,000 px | 1,058.33 mm | 793.75 mm | 508.00 mm | 254.00 mm | 127.00 mm |
| 3,508 px | 1,237.54 mm | 928.16 mm | 594.02 mm | 297.01 mm | 148.51 mm |
| 4,000 px | 1,411.11 mm | 1,058.33 mm | 677.33 mm | 338.67 mm | 169.33 mm |
| 5,000 px | 1,763.89 mm | 1,322.92 mm | 846.67 mm | 423.33 mm | 211.67 mm |
| 6,000 px | 2,116.67 mm | 1,587.50 mm | 1,016.00 mm | 508.00 mm | 254.00 mm |
| 8,000 px | 2,822.22 mm | 2,116.67 mm | 1,354.67 mm | 677.33 mm | 338.67 mm |
All values are rounded to two decimal places, following the formula mm = px × 25.4 ÷ DPI.
If instead of a single pixel value you need the dimensions of a finished format (for example a business card, a DL flyer, or an A4 sheet), the table below lists the values at the two most commonly used resolutions. Dimensions are always given as width × height.
| Format | W × H (mm) | W × H (150 DPI) | W × H (300 DPI) |
|---|---|---|---|
| Business cards & ID | |||
| Polish business card | 90 × 50 mm | 531 × 295 px | 1,063 × 591 px |
| European business card | 85 × 55 mm | 502 × 325 px | 1,004 × 650 px |
| Payment / SIM card (ISO ID-1) | 85.60 × 53.98 mm | 506 × 319 px | 1,011 × 638 px |
| Flyers & print | |||
| DL flyer | 99 × 210 mm | 585 × 1,240 px | 1,169 × 2,480 px |
| Postcard / A6 | 105 × 148 mm | 620 × 874 px | 1,240 × 1,748 px |
| ISO A-series paper | |||
| A5 | 148 × 210 mm | 874 × 1,240 px | 1,748 × 2,480 px |
| A4 | 210 × 297 mm | 1,240 × 1,754 px | 2,480 × 3,508 px |
| A3 | 297 × 420 mm | 1,754 × 2,480 px | 3,508 × 4,961 px |
| A2 | 420 × 594 mm | 2,480 × 3,508 px | 4,961 × 7,016 px |
| A1 | 594 × 841 mm | 3,508 × 4,967 px | 7,016 × 9,933 px |
| A0 | 841 × 1,189 mm | 4,967 × 7,022 px | 9,933 × 14,043 px |
| Documents & large format | |||
| EU passport / ID photo | 35 × 45 mm | 207 × 266 px | 413 × 531 px |
| B1 poster | 707 × 1,000 mm | 4,175 × 5,906 px | 8,350 × 11,811 px |
| Roll-up banner | 850 × 2,000 mm | 5,020 × 11,811 px | 10,039 × 23,622 px |
These values mirror the table in our mm to px converter — you can always work from either direction, as long as you know the pixel count and the target DPI.
| Property | Pixel (px) | Millimeter (mm) |
|---|---|---|
| Unit type | Digital, screen-based | Physical, tangible |
| Depends on device | Depends on DPI or PPI | Always the same |
| Screen 96 DPI | 1 px = 0.265 mm | 1 mm = 3.78 px |
| Print 300 DPI | 1 px = 0.085 mm | 1 mm = 11.81 px |
| Industry standard | Screens, web design, UI | Print, packaging, CAD |
You are handed a file with a given pixel count and want to know what it is good for. This table runs that way: from the resolution of the file to the size on paper at two print thresholds. The 300 DPI column covers offset and digital print viewed close up, the 150 DPI column covers posters and material seen from a metre away.
| File resolution | Size at 300 DPI | Size at 150 DPI | Closest format |
|---|---|---|---|
| 413 × 531 px | 35 × 45 mm | 70 × 90 mm | ID photo |
| 1,004 × 650 px | 85 × 55 mm | 170 × 110 mm | European business card |
| 1,050 × 600 px | 89 × 51 mm | 178 × 102 mm | US business card |
| 1,169 × 2,480 px | 99 × 210 mm | 198 × 420 mm | DL flyer |
| 1,748 × 2,480 px | 148 × 210 mm | 296 × 420 mm | A5 sheet |
| 2,480 × 3,508 px | 210 × 297 mm | 420 × 594 mm | A4 sheet |
| 3,508 × 4,961 px | 297 × 420 mm | 594 × 840 mm | A3 sheet |
| 1,920 × 1,080 px | 163 × 91 mm | 325 × 183 mm | Full HD screenshot |
| 4,000 × 3,000 px | 339 × 254 mm | 677 × 508 mm | 12 Mpx phone photo |
| 6,000 × 4,000 px | 508 × 339 mm | 1,016 × 677 mm | 24 Mpx camera photo |
Sizes are rounded to whole millimeters following the formula mm = px × 25.4 ÷ DPI. The format column names the closest print standard, so before sending anything to a print shop check the side ratio and the bleed as well. A result longer than a thousand millimeters is written in meters: 6,000 pixels at 150 DPI is 1,016 mm, or 1.016 m, which the pixels to meters converter reports.
Every figure in the tables was computed from the unit definitions and checked arithmetically before publication. Historical values and the names of local units come from the sources listed above.
Content last reviewed: · written and checked by the Arteon team
It depends entirely on the resolution you set. At the standard 96 DPI screen resolution, one pixel is about 0.265 mm, and at the 300 DPI used for print, only 0.085 mm. To convert any number of pixels to millimeters, multiply it by 25.4 and divide by the DPI.
The formula comes from a fixed relationship: one inch is exactly 25.4 mm. The full formula is millimeters = pixels × 25.4 ÷ DPI. It also works in reverse: pixels = millimeters × DPI ÷ 25.4. You only need two values — the pixel count and the target resolution — to instantly calculate the third.
The simplest way is to type the pixel count into the converter field and pick the DPI you need — the result appears instantly. If you would rather calculate it by hand, use the formula: millimeters = pixels × 25.4 ÷ DPI. For 500 px at 300 DPI, you get 500 × 25.4 ÷ 300, or about 42.33 mm.
One hundred pixels on a 96 DPI screen is exactly 26.46 mm. At 300 DPI print resolution, the same 100 pixels only takes up 8.47 mm, and at 600 DPI just 4.23 mm. This value is worth remembering, since it often appears in button and icon sizes on websites.
Five hundred pixels is about 132.29 mm on a 96 DPI screen and 42.33 mm at 300 DPI print resolution. 500 px is a popular width for ad banners and avatars, so it is a useful value to remember when estimating sizes quickly.
One thousand pixels at 96 DPI is about 264.58 mm. At 300 DPI print resolution, the same 1,000 pixels is 84.67 mm — enough for a large label or a small photo. At the 150 DPI used for posters and brochures, it comes out to 169.33 mm, roughly postcard-sized.
A file that is 2,480 pixels wide at 300 DPI is exactly 210 mm — the width of an A4 sheet. A print shop will accept the file without issue if the height is 3,508 px (297 mm). The same file on a 96 DPI screen would take up 656.17 mm, stretching well beyond the visible area of a typical monitor.
Six thousand pixels is a typical width for a photo from a mid-range DSLR or mirrorless camera. At 300 DPI used for photo printing, that comes out to 508 mm — comfortably enough for an A2-sized poster or a wide gallery print. If the photo has a 3:2 ratio, the other edge is 4,000 px, or 338.67 mm.
Subtract twice the bleed from the file dimension and you get the trimmed format. A file 1,133 px wide at 300 DPI is 95.9 mm, so taking off two 3 mm bleeds leaves 89.9 mm, a 90 mm business card. If the subtraction lands on a size that matches no standard format, the file most likely arrived without bleed.
Figma works exclusively in pixels at a fixed 96 DPI — there is no option to switch the unit to millimeters. To check a Figma project's physical dimensions, copy the pixel count from the Design panel and type it into our converter, setting your target DPI (96 for screen, 300 for print).
The ISO ID-1 standard, which applies to payment cards, ID cards, and driving licences, is exactly 85.60 × 53.98 mm.[2] A 1,011 × 638 px file at 300 DPI matches that exact size. A file of 1,011 × 638 px at 300 DPI hits that standard to a tenth of a millimeter.
Apple Retina screens pack pixels twice as densely as a classic monitor, but the operating system still interprets dimensions as if the panel had 96 DPI. In practice this means one physical pixel takes up about 0.132 mm instead of 0.265 mm, yet in the design panels of Photoshop, Figma or Canva the values stay identical — you prepare the artwork at double resolution and export it with the @2x suffix.
No, that is a common misconception. A pixel and a millimeter are two different units — one digital, one physical — and the relationship between them changes with the DPI resolution. At the standard 96 DPI screen, one pixel is about 0.265 mm, while at 300 DPI print resolution it is only 0.085 mm. There is no single fixed value that applies universally.
A Polish business card at 1,063 × 591 px is exactly 90 × 50 mm at 300 DPI. A European business card at 1,004 × 650 px is 85 × 55 mm at the same resolution. After adding the standard 3 mm bleed on every edge, the dimensions grow to 96 × 56 mm, or about 1,134 × 661 px.
In Adobe Illustrator, go to Edit › Preferences › Units and choose Millimeters — the unit changes across all panels and rulers immediately. InDesign uses millimeters by default. In both programs, the result depends on the resolution set when exporting the file, usually 300 DPI for print. You will find detailed guides for Illustrator, InDesign, CorelDRAW, Photoshop, Figma, and Canva in the section above.
DPI (dots per inch) is the number of ink dots per inch of material and is a printer specification. PPI (pixels per inch) is the number of pixels per inch of screen and describes a monitor or display. In everyday use, designers use both terms interchangeably, but technically DPI applies to print and PPI to screens.
Missing a value in the tables, found a calculation error, or have a feature suggestion? Send us a message — we read every message personally and reply within 24 hours.