Pixel to Millimeter Converter
Convert between pixels and millimeters based on DPI for design and print applications
Common DPI Values
Conversion Formula
mm = (px × 25.4) / DPI
px = (mm × DPI) / 25.4
Quick Reference
1 inch = 25.4 mm
A4: 210 × 297 mm
Letter: 215.9 × 279.4 mm
💡 Pro Tips for Lazy Marketers
- • Screen vs. Print: Use 72 or 96 DPI for web/screen images. For print, 300 DPI is the standard for good quality.
- • Physical Sizing: This tool helps visualize how large a digital image will be when printed, or to determine pixel dimensions for a required physical print size.
- • Design Handoffs: Always specify DPI alongside pixel or millimeter dimensions when working with designers or printers to avoid miscommunication.
- • Image Quality: Converting a low-DPI image to high DPI for print without sufficient pixel density will result in blurry output. Always start with high-resolution source images.
- • Responsive Design: Understanding pixel density (DPI/PPI) helps in appreciating how UIs scale on different device screens.