PX to MM Converter
Convert pixel values to millimeters for precise print design and physical measurements with DPI-aware calculations. Perfect for international print design and precision requirements.
At 96 DPI: 1mm ≈ 3.78px · 1px ≈ 0.265mm
Continue Your Code Journey
What is PX to MM Converter?
PX to MM converter changes pixel measurements into millimeters using a configurable DPI value. The px to mm formula is mm = px / DPI x 25.4, so physical size depends on the output resolution. Use it for print production, packaging, engineering specs, and metric design layouts.
How does PX to MM Converter work?
This tool divides the pixel value by DPI to get inches, then multiplies by 25.4 to convert to millimeters. You enter the pixel measurement and set the DPI, and the tool calculates the millimeter equivalent.
Key Features
- Configurable DPI value
- Quick presets (72, 96, 150, 300 DPI)
- Real-time conversion
- Copy result to clipboard
- Shows both px and mm values
- Uses px / DPI x 25.4 conversion math
- Bidirectional: mm to px too
- High precision output
Common Use Cases
Engineering specifications
Convert pixel-based digital designs to millimeter measurements for CAD or manufacturing specs.
Print production in metric regions
Convert digital pixel dimensions to millimeters for print shops that use metric standards.
Packaging design
Map pixel artwork dimensions to millimeter measurements for product packaging layouts.
Screen to physical measurement
Determine the physical millimeter size of a UI element on a screen based on its DPI.
How to Use This Tool
Enter pixel value
Type the pixel measurement you want to convert.
Set DPI
Choose or enter the DPI value (96 for screen, 300 for print).
View the result
The millimeter equivalent is displayed instantly.
Copy the value
Copy the converted measurement for use in your project.
Pro Tips
- 1
1 inch = 25.4 millimeters, which is the constant used in the conversion.
- 2
96 DPI is the standard for screen content.
- 3
300 DPI is common for print-quality output.
- 4
Double-check DPI values when working with manufacturing specs.
Frequently Asked Questions
What is the formula for px to mm?
The formula is mm = px / DPI x 25.4. You divide pixels by DPI to get inches, then multiply by 25.4 to get millimeters.
Is my data sent to a server?
No. The PX to MM converter calculates locally in the browser. Nothing is transmitted.
What DPI should I use?
Use 96 DPI for screen-based content. Use 300 DPI for standard print output. Match the DPI to your target output device.
Can I convert mm back to pixels?
Yes. The tool supports bidirectional conversion. Enter the millimeter value and DPI to get the pixel equivalent.
Why do I need to set DPI for a metric conversion?
DPI connects digital pixels to physical measurements. Without DPI, pixels have no physical size. The DPI value determines how many pixels fit in one inch, which is then converted to millimeters.