1. Enter a value
Type a number in the input field. You can use a period or comma as the decimal separator.
Convert mm to px – A4, business cards, print dimensions
1mm at 300 DPI = 11.81px. Enter any millimeter dimension and target DPI to get print-ready pixel counts for your document or design.
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When do you need to convert mm to pixels?
In precision design work, dimensions are often specified in millimeters. To prepare digital images, you need to convert mm to pixels at the target DPI: pixels = mm × DPI / 25.4.
This conversion is essential for packaging design, label printing, product photography, and any work requiring precise mm-to-pixel mapping.
At 300 DPI: 1 mm = 11.81 pixels, 85 mm (business card width) = 1,004 pixels.
All calculations run locally in your browser — nothing is sent to any server.
How to use the converter?
2. Read the result
The conversion result appears instantly in the field next to it – no clicking required.3. Copy or reverse
Click Copy result or use the Reverse button to convert in the opposite direction.
When is this converter useful?
Business cards, flyers, and DL envelopes
Standard business card size is 85 × 55mm. At 300 DPI with 3mm bleed: 91 × 61mm = 1,075 × 720px canvas. A DL flyer (99 × 210mm) at 300 DPI = 1,169 × 2,480px. A DL envelope window is typically 45 × 90mm = 532 × 1,063px at 300 DPI. Getting these dimensions right prevents reprints due to incorrect canvas sizes.Receipt printers and thermal paper
Thermal receipt printers use 80mm paper width as the global standard. At 203 DPI (common for Zebra and Epson receipt printers): 80mm = 638px wide. At 300 DPI: 80mm = 944px. If you are generating receipt images or PDF templates, this converter gives you the correct pixel width for any thermal printer DPI.Bleed and safe zone calculations
Print files require a bleed area — typically 3mm on each edge — to prevent white borders after trimming. For a 210 × 148mm A5 flyer: add 3mm to each side to get 216 × 154mm. At 300 DPI: 2,551 × 1,819px. This tool lets you calculate both the trim size and the full bleed canvas size in one step.Label printing and InDesign document setup
Label printing for products requires precise mm-to-px mapping. A standard shipping label (100 × 150mm) at 300 DPI = 1,181 × 1,772px. In Adobe InDesign, document pages are set in mm, but placed images must be at the correct pixel resolution. This converter bridges the gap between InDesign's mm canvas and Photoshop's pixel canvas.
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What makes this converter different?
Complete privacy
All calculations run locally in your browser. No data is sent to any server.Real-time results
The result updates instantly as you type – no need to click any button.Bidirectional conversion
The Reverse button lets you convert in both directions with one click.Reference table
A ready-made table with commonly converted values and contextual descriptions.
How does mm to pixel conversion work?
The formula is: pixels = mm × DPI / 25.4. Since 1 inch = 25.4 mm exactly.
At 300 DPI: 1 mm = 11.811 pixels. At 600 DPI: 1 mm = 23.622 pixels.
For bleed area: add 3 mm (standard) to each edge. A 100 × 50 mm design with 3 mm bleed = 106 × 56 mm = 1,252 × 661 px at 300 DPI.
Practical tips
- Business card: 85 × 55 mm + 3 mm bleed = 91 × 61 mm = 1,075 × 720 px at 300 DPI.
- Standard label: 50 × 25 mm at 300 DPI = 591 × 295 px.
- Wine label: 90 × 120 mm at 300 DPI = 1,063 × 1,417 px.
- Minimum text: 8pt font needs at least 150 DPI to be readable.
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MM to pixels at various DPI
| Feature | 300 DPI | 600 DPI |
|---|---|---|
| 1 mm | 11.81 px | 23.62 px |
| 10 mm | 118 px | 236 px |
| 85 mm (card) | 1,004 px | 2,008 px |
| Use case | Standard print | Fine art / medical |
| File size | Standard | 4× larger |
Convert other units to Pixels
Explore other unit converters
Frequently asked questions
How many pixels is 1 mm at 300 DPI?
1mm at 300 DPI = 11.811 pixels. Formula: pixels = mm × DPI / 25.4. At 150 DPI: 1mm = 5.906px. At 96 DPI (screen): 1mm = 3.779px. At 600 DPI: 1mm = 23.622px.
What is print bleed and how do I calculate it in pixels?
Bleed is extra artwork area (typically 3mm) beyond the trim edge to prevent white borders after cutting. For a 210 × 297mm A4 page: add 3mm to each edge to get 216 × 303mm. At 300 DPI: 2,551 × 3,579px. Always provide the full bleed canvas to your print shop.
What DPI should I use for business cards?
300 DPI is the standard minimum for business cards. Premium printers may request 600 DPI for very fine text or detailed logos. The standard business card size is 85 × 55mm: at 300 DPI = 1,004 × 650px, at 600 DPI = 2,008 × 1,299px.
What is the pixel width of 80mm thermal receipt paper?
Standard thermal receipt paper is 80mm wide. At 203 DPI (common Epson/Zebra setting): 80mm = 638px. At 300 DPI: 80mm = 944px. The printable width is slightly less — typically 72mm (the paper minus margins), which at 203 DPI = 575px.
How do I set up a document in InDesign for print using mm?
In Adobe InDesign, create a new document with Millimeters as the unit. Enter your trim size (e.g. 210 × 297mm for A4), add 3mm bleed on all sides. Place images at their native pixel resolution — a 2,480px wide image in a 210mm column prints at exactly 300 DPI.
What mm dimensions correspond to standard paper sizes?
A4 = 210 × 297mm, A5 = 148 × 210mm, A3 = 297 × 420mm, Letter (US) = 215.9 × 279.4mm, Legal (US) = 215.9 × 355.6mm, Business card = 85 × 55mm, DL envelope = 99 × 210mm.
Can I use mm in CSS?
Yes, CSS accepts mm as a unit. 1mm in CSS = 3.779 CSS pixels (at 96 DPI). This is only meaningful in @media print stylesheets — on screen, mm does not correspond to physical millimeters because browsers do not know the physical screen size.
Are calculations done locally?
Yes. All calculations run in your browser. No data is sent to any server.
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