Convert physical photo dimensions to pixel resolution. Supports millimeters, centimeters, inches, and custom DPI settings.
PX to REM Converter
A bidirectional PX to REM converter for front-end developers and designers, featuring customizable root font sizes.
Pixel to Millimeter Converter
Accurately calculate the physical dimensions between pixels and millimeters based on PPI density. Ideal for UI design and print typography.
Pixel to Centimeter Converter
Accurately convert pixel lengths to physical centimeter dimensions based on PPI (Pixels Per Inch). Ideal for UI design, print layouts, and screen adaptation.
When you need to convert the physical dimensions of a photo (such as millimeters, centimeters, or inches) into the pixel resolution required for screens or printing, this tool provides precise calculations using the DPI (Dots Per Inch) parameter. It outputs the corresponding pixel width and height based on the formula "Pixels = (Physical Size / Unit Conversion Factor) × DPI", ensuring your images remain crisp and clear across different devices and media.
Q: How many pixels per centimeter is 300 DPI?
A: It is approximately 118 pixels/cm. The conversion formula is: Pixels per centimeter = DPI ÷ 2.54.
Q: What is the difference in DPI settings between web and print images?
A: Web images typically use 72-96 DPI to balance clarity and loading speed. Printed materials require 300 DPI or higher to ensure output precision; a lower DPI will result in blurry images.
Input values must be valid numbers; negative values or text are not supported. The DPI setting directly affects output quality, so please choose according to your actual use case. This tool only performs dimension conversion and does not modify the image file itself.
For print design, it is recommended to always use 300 DPI to ensure output quality. Common example: A 10cm × 15cm photo output at 300 DPI is approximately 1181 × 1772 pixels, whereas at 72 DPI, it is only 283 × 425 pixels. For screen display, you can appropriately lower the DPI to optimize file size.
