File Setup

DPI & Print Resolution Guide

Resolution is the single most common reason printed pieces look worse than expected. A photo that looks sharp on your monitor can print blurry at 5×7. Understanding why — and how to avoid it — doesn't require technical expertise. It requires knowing one number and what it means.

What Is DPI?

DPI stands for dots per inch. It describes how many ink dots a printer lays down within each inch of the printed surface. More dots per inch = finer detail, smoother gradients, and sharper edges.

When someone says "300 DPI," they mean the image file contains enough pixel data to allow the printer to place 300 dots across every inch of the finished print. At that density, individual dots are invisible to the naked eye and the image looks continuous — like a photograph, not a grid of squares.

DPI vs. PPI — What's the Difference?

PPI (pixels per inch) describes resolution in a digital image file. Your image editing software measures files in PPI. DPI technically refers to the printer's output. In practice, people use them interchangeably — when your designer says "set your image to 300 DPI," they mean the image file should have 300 pixels per inch at its intended print size. The printer handles the DPI conversion.

Why 300 DPI Is the Standard for Most Print

The human eye has a practical limit to the detail it can resolve at normal reading distance — roughly 10–16 inches. At 300 DPI, printed dots are about 1/300th of an inch apart, which is below the threshold of what most people can distinguish individually.

Below 300 DPI, you start to see a loss of sharpness on close-up print. At 150 DPI you might notice it; at 72 DPI (standard screen resolution) it will be visibly pixelated or blurry in most print applications.

How to Check the Resolution of Your Image

In Photoshop: Image → Image Size. Look at the "Resolution" field with "Resample" unchecked. This shows you the true DPI at the current document size.

The trap: Photoshop also shows you the image dimensions in pixels. A 1500×1000 pixel image might report as 300 DPI at 5″×3.3″, but only 72 DPI at 20.8″×13.9″. Resolution and size are always linked — when one goes up, the other goes down at a fixed pixel count.

What Happens When Resolution Is Too Low

Low-resolution images print as visible pixel blocks, blurry edges, or soft/fuzzy details. The most common causes:

• Using an image downloaded from a website (typically 72–96 DPI, designed for screen)
• Scaling up a small image to fill a larger area in your design software
• Taking a screenshot instead of exporting from the original design file
• Saving a JPEG at low quality multiple times (JPEG compression compounds with each save)

Recommended Resolution by Product

Large Format Is Different

Banners and backdrops are a special case. At 4×8 feet, a 300 DPI file would require a 48,000-pixel-wide image — an enormous file that serves no practical purpose because the piece is never viewed at arm's length. At a typical viewing distance of 10–15 feet, 100 DPI at full size looks identical to 300 DPI.

The practical rule for large format: design at the actual final size, at 100–150 DPI. Don't scale down the document and work at 300 DPI "reduced" — submit the file at the actual dimensions. See the banner size guide for more.

Frequently Asked Questions