MM to Pixels Converter is the most accurate online tool to convert millimeters to pixels, helping you size images and designs with precision.
MM to PX PX to MM
MM to Pixels — Easy, Accurate Conversion
The MM to Pixels converter helps designers, developers, and print teams quickly
convert millimeters to pixels for precise layouts in web, print, and tools like Canva.
It’s essential for sizing assets such as passport photos, A4 documents, and UI components.
Formula (screen/print): pixels = millimeters × (PPI ÷ 25.4)
- At 96 PPI (standard monitors), 1 mm ≈ 3.78 px.
- At 300 PPI (print quality), 1 mm ≈ 11.81 px.
10 mm → ≈ 37.8 px | 35 mm → ≈ 132.3 px | 50 mm → ≈ 189.0 px
Tip: For print, switch to 300 PPI in the converter. Need the reverse? Try our Pixels to MM and DPI/Resolution tools.
MM to Pixels Calculator — Quick & Accurate
Use this MM to Pixels calculator to convert millimeters into pixels instantly.
Simply enter the size in millimeters, add the DPI/PPI value, and get the result in pixels.
Perfect for designers, printers, and anyone needing precise sizing.
Formula: px = (mm ÷ 25.4) × DPI
- 1 mm to pixel at 96 DPI → ≈ 3.78 px
- 50 mm at 300 DPI → ≈ 590 px
- 35×45 mm passport photo at 300 DPI → ≈ 413 × 531 px
- A4 size (210 × 297 mm) at 300 DPI → ≈ 2480 × 3508 px
These conversions help with passport photos, A4 prints,
and screen-to-print designs, ensuring your dimensions remain accurate across devices and formats.
What is MM to PX?
Millimeters (mm) are a physical unit of length used in printing and real-world measurements,
while pixels (px) are the smallest digital units that make up images on screens.
Since pixels depend on screen resolution (DPI/PPI), the conversion between millimeters to pixels
is essential in web design, Canva layouts, and preparing files for print.
For example, a 35 mm × 45 mm photo converts to different pixel values depending on DPI:
at 300 DPI it’s ≈ 413 × 531 px, while at 96 DPI it’s much smaller.
That’s why understanding mm to pixel is crucial for designers and photographers.
Millimeters to Pixels Conversion Table
Quick reference to convert millimeter to pixel values at 96 DPI. Perfect for print sizing, web design, and Canva layouts.
Need exact values? Use the calculator above, or scan the most common mm → px conversions below.
| Millimeters (mm) | Pixels (px) @ 96 DPI |
|---|---|
| 1 mm | 3.77 px |
| 5 mm | 18.89 px |
| 10 mm | 37.8 px |
| 20 mm | 75.59 px |
| 35 mm | 132.28 px |
| 50 mm | 188.98 px |
| 75 mm | 283.46 px |
| 100 mm | 377.95 px |
| 200 mm | 755.91 px |
| 300 mm | 1133.86 px |
| 400 mm | 1511.81 px |
| 500 mm | 1889.76 px |
A4 & Standard Sizes in Pixels
One of the most common questions for designers and print professionals is:
“What is the A4 size in pixels?”.
Since A4 dimensions are fixed at 210 × 297 mm, the pixel dimensions
depend on the DPI (dots per inch) setting.
Below you’ll find detailed conversions for A4 size in mm,
A4 size in pixels at different resolutions, and even
passport photo sizes.
These conversions are essential when preparing print-ready files, designing in Canva,
or exporting documents for publishing.
For sharp print, 300 DPI is the standard. For drafts or web previews,
lower DPI values like 150 may be sufficient.
| Paper Size | Dimensions (mm) | Pixels @ 150 DPI | Pixels @ 300 DPI |
|---|---|---|---|
| A4 | 210 × 297 mm | 1240 × 1754 px | 2480 × 3508 px |
| A5 | 148 × 210 mm | 874 × 1240 px | 1748 × 2480 px |
| A6 | 105 × 148 mm | 620 × 874 px | 1240 × 1748 px |
| Passport Photo | 35 × 45 mm | 413 × 531 px | 826 × 1062 px |
As shown above, A4 in pixels is 2480 × 3508 px at 300 DPI.
This is the required setting for high-quality printing.
Passport size photos (35 × 45 mm) are standardized to 413 × 531 px at 300 DPI,
making them suitable for official documents and IDs.
Always check the DPI setting before exporting to ensure your images meet printing or uploading requirements.
Practical Use Cases for MM to PX Conversion
Converting millimeters to pixels (mm to px) is essential in multiple fields where accuracy matters.
Whether you are printing, designing digitally, or creating web interfaces, this conversion ensures your work looks consistent across devices and outputs.
- Printing: Posters, brochures, and A4 documents require exact pixel sizes to meet DPI standards. For sharp output, always design at 300 DPI.
- Digital Design: Tools like Photoshop, Illustrator, and Canva often need you to convert mm values into px to align elements properly on screen.
- Web & UI: Precise font and image sizing ensures that user interfaces remain consistent across devices, especially when converting assets like icons or logos from mm to px.
These use cases highlight why a reliable mm to pixels converter is a must-have for anyone working with print and digital media. It bridges the gap between physical measurements and digital screens with accuracy.
Related Conversions
Explore more unit conversion tools that complement our mm to pixels converter.
These calculators help you switch easily between different formats depending on your project needs:
📐 Pixels to MM Converter
Convert pixels back into millimeters for precise print or design requirements.
📏 Pixels to CM Converter
Quickly change pixels to centimeters for both digital design and print layouts.
📎 Pixels to Inches Converter
Convert pixel values into inches—ideal for posters, flyers, and screen-based sizing.
MM to PX — FAQ
Quick answers for common questions about mm to pixels (default examples shown at 96 PPI for screens and 300 DPI for print).
How many pixels are in 1 mm?
Formula: px = (mm ÷ 25.4) × PPI.
• At 96 PPI → 1 mm ≈ 3.78 px.
• At 300 DPI → 1 mm ≈ 11.81 px.
What is 35 mm × 50 mm in pixels?
At 300 DPI (passport quality):
35 mm → ≈ 413 px | 50 mm → ≈ 591 px.
Result: ≈ 413 × 591 px.
How many pixels is 35 × 45 mm?
At 300 DPI: 35 mm → ≈ 413 px, 45 mm → ≈ 531 px.
Result: ≈ 413 × 531 px.
How many pixels is a 50 mm × 70 mm photo?
At 300 DPI: 50 mm → ≈ 591 px, 70 mm → ≈ 827 px.
Result: ≈ 591 × 827 px.
How to convert pixels to mm in ImageJ?
In ImageJ: Analyze → Set Scale → enter a known pixel length and its real-world length in mm → set Unit of Length to mm → OK.
Then use Analyze → Measure to read sizes in millimeters. For quick math, use our tool: mm to pixels 300 dpi with px = (mm ÷ 25.4) × DPI.
Fast checks (mm → px at 300 DPI)
- 1 mm → 11.81 px
- 20 mm → 236 px (≈ 20/25.4×300)
- 50 mm → 591 px
- 51 × 51 mm → ≈ 602 × 602 px
For printing presets, set DPI = 300; for screens, PPI = 96.
Conclusion
Converting millimeters to pixels ensures accurate print sizes, digital layouts, and passport photo standards.
Use our free mm to pixels converter for instant, reliable results in both screen and print design.
Reference: Wikipedia — Pixel density