DPI Changer
Drag & Drop your image here or click to browse
Output Specification
The Print-Ready Guide: Understanding DPI
The Adiminium DPI Changer helps you bridge the gap between the digital world (Screens) and the physical world (Paper). One of the most common errors in printing is sending a "Screen Resolution" image to a printer, resulting in a blurry, pixelated mess. This tool calculates the math for you.
DPI vs. PPI vs. Resolution
- Resolution (Pixels): The absolute amount of data. e.g., 1920 x 1080 pixels.
- DPI (Dots Per Inch): An instruction to the printer on how densely to pack those pixels.
- Physical Size: The result. Resolution / DPI = Inches.
Example: A 1000px wide image at 100 DPI prints at 10 inches wide.
The same 1000px image at 500 DPI prints at 2 inches wide. (Smaller, but much sharper).
Common DPI Standards
- 72 DPI: Old standard for screens. Never use for print.
- 96 DPI: Standard for Windows screens.
- 150 DPI: "Good enough" for home inkjet printers or large posters viewed from 5 feet away.
- 300 DPI: The Gold Standard. Required for magazines, brochures, and professional photo prints.
- 600 DPI: Archival art prints and ultra-fine line art.
Step-by-Step Guide
- Upload: Load your digital file.
- Choose Target DPI: Select 300 for a photo print.
- Choose Target Physical Width: How big is the paper? Enter "4" for a standard 4x6 photo.
- Auto-Calculate: The tool determines you need 1200 pixels (4 inches * 300 DPI).
- Process: The tool uses high-quality resampling to enlarge or shrink your image to exactly 1200 pixels wide.
Frequently Asked Questions
Can I turn a tiny web image into a poster?
You can try, but you can't create detail from nothing. If you ask for a 24-inch poster at 300 DPI from a 500px web image, the tool has to invent millions of pixels. The result will be soft. It's always better to start with a large high-res original.