The Definitive Guide to DPI vs. PPI: Which Matters for Print?

The confusion between **DPI (Dots Per Inch)** and **PPI (Pixels Per Inch)** is one of the most common stumbling blocks for designers. Get it wrong, and your high-quality image can turn into a pixelated mess when printed.

Pixels Per Inch (PPI): The Digital Measure

**PPI** refers to the density of **pixels** in a digital image. This metric is solely concerned with digital displays. For web, the PPI value is largely irrelevant; a screen simply displays a fixed number of pixels. However, it becomes important when setting the initial size and quality of an image before printing.

Dots Per Inch (DPI): The Print Measure

**DPI** refers to the number of tiny **ink dots** a printer can place within an inch. This is a measure of the printer's output capability. Standard photo prints often require **300 DPI** for high quality, while billboards might only need 150 DPI due to viewing distance.

The Takeaway

When preparing an image for print, ensure your digital image has enough **pixels** to satisfy the required **DPI** at the final print size. If you need a 10-inch print at 300 DPI, your image must be at least 3,000 pixels wide. Our image reducer can help you calculate and resize correctly!