PX to MM Converter & Conversion Tables [Online Calculator]

Q: How do I convert Pixels to MM in design tools?

To convert PX to MM, use this formula: MM Value = (PX Value ÷ DPI) × 25.4 . Example: 300px ÷ 300 DPI × 25.4 = 25.4 mm .

Q: What DPI should I use for print designs?

For high-quality prints, 300 DPI is the industry standard.

Q: What DPI should I use for web images?

Web images should typically be set to 72 DPI for faster load times and web optimization.

Easily convert pixels (PX) to millimeters (MM) with this free online converter. Ideal for graphic designers, web developers, and print designers, this tool ensures precise scaling for print layouts, digital designs, and international print standards.

✅ Perfect for calculating print dimensions from pixel sizes.
✅ Ensures your designs are correctly scaled for brochures, posters, and other visual materials.

Start Converting Now →

PX to MM Conversion Calculator

PX to MM Converter

Enter your pixel (PX) value below to instantly calculate the millimeter (MM) value.

Pixel (PX) Value: DPI (Dots Per Inch) Value: Millimeter (MM) Value:

Input Field → Enter Pixel (PX) Value
DPI Input → Enter DPI (Dots Per Inch) Value
Convert Button → Instantly Calculate MM Value
Copy Button → One-click copy for easy use in design tools
Reset Button → Clear your inputs with one click

Example Calculation:

300px at 300 DPI = 25.4 mm

PX to MM Conversion Table (Based on 300 DPI Resolution)

PX	DPI	MM (Millimeters)
300px	300 DPI	25.4 mm
600px	300 DPI	50.8 mm
900px	300 DPI	76.2 mm
1200px	300 DPI	101.6 mm
1800px	300 DPI	152.4 mm
2400px	300 DPI	203.2 mm
3600px	300 DPI	304.8 mm

Use this table to calculate common print resolutions for precise sizing.

How to Use the PX to MM Converter?

Step 1: Enter your pixel value in the input field.

Step 2: Enter your desired DPI (Dots Per Inch) value.

Step 3: Click the “Convert” button to get the MM value instantly.

Step 4: Use the copy button to grab the calculated MM value for quick use in your design tools.

Step 5: Reference the conversion table for common resolutions.

💡 Pro Tip: Use 300 DPI for high-quality prints and 72 DPI for standard screen resolutions.

When to Use PX vs MM in Design?

PX (Pixel)

✅ Best for web-based designs and digital interfaces.
✅ Commonly used in websites, UI/UX designs, and app interfaces.

MM (Millimeters)

✅ Essential for ensuring accurate print dimensions.
✅ Preferred for brochures, flyers, and posters in international print standards.

Which One Should You Use?

Use PX for precise, fixed-size designs in web projects.
Use MM to scale your visuals accurately for print materials.

FAQs About PX to MM Conversion

How do I convert Pixels to MM in design tools?

To convert PX to MM, use this formula: MM Value = (PX Value ÷ DPI) × 25.4. Example: 300px ÷ 300 DPI × 25.4 = 25.4 mm.

What DPI should I use for print designs?

For high-quality prints, 300 DPI is the industry standard.

What DPI should I use for web images?

Web images should typically be set to 72 DPI for faster load times and web optimization.

Can I resize pixel images to millimeters without quality loss?

Yes, as long as your original image resolution is high enough to maintain clarity.

How do I ensure my designs print at the right size?

Use this converter to calculate your pixel-to-millimeter conversion accurately and scale your designs accordingly.

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