What DPI Do You Need for Print? The Definitive Guide

"Make sure it's 300 DPI" is the most repeated advice in print — and the most misunderstood. A photo can say 300 DPI in its file info and still print blurry. Here's what resolution really means for print, and how to get it right every time.

DPI, PPI and why the difference barely matters

Technically, PPI (pixels per inch) describes a digital image, while DPI (dots per inch) describes a printer's output. In everyday print talk the two are used interchangeably: when a printer asks for 300 DPI, they mean 300 image pixels for every inch of printed size.

Effective resolution is what counts

The DPI number stored in an image file is just metadata. What actually matters is effective resolution: the number of pixels divided by the size the image is placed at in your layout.

Example: a photo is 1500 × 1000 pixels.

• Placed at 5 × 3.33 in → 1500 / 5 = 300 DPI ✓
• Placed at 10 × 6.67 in → 1500 / 10 = 150 DPI ⚠
• Placed at 15 × 10 in → 1500 / 15 = 100 DPI ✗

Scaling an image up in InDesign, Illustrator or Canva lowers its effective DPI. Scaling it down raises it.

How much DPI do you need?

Product	Target	Minimum
Business cards, brochures, magazines	300	250
Flyers, postcards	300	200
Posters viewed at 1–2 m	150–200	120
Banners and billboards	50–100	30
Newsprint	200	150

The farther away people view a print, the less resolution it needs. A billboard at 100 DPI looks sharp from the road.

Line art is different

Scanned logos, signatures and one-color line art need 600–1200 DPI to keep edges crisp. Better still, use vector artwork — vectors have no resolution limit at all.

Why you can't just "change it to 300"

Changing the DPI field in Photoshop without resampling only changes the print size. Turning on resampling invents new pixels by interpolation, which usually makes images look soft. The real fixes are:

• Find a larger original (ask the client, re-download the high-res stock file).
• Place the image smaller in your layout.
• Use AI upscaling, which reconstructs detail far better than classic interpolation.

How AI upscaling helps

Modern super-resolution models are trained on millions of images and can enlarge a photo 4× while adding plausible detail to edges, textures and faces. A 600 × 400 web image becomes 2400 × 1600 — enough for a sharp 8 × 5.3 in print at 300 DPI. It isn't magic for tiny thumbnails, but it rescues most "almost good enough" photos.

Check it automatically

Artwork Proofing calculates the effective DPI of every image in your PDF at its placed size. Low-resolution images get numbered callouts right on the page preview and highlighted rows in the DPI table. With Pro or a credit pack you can upscale any flagged image 4×, compare before and after with a slider, and download a corrected PDF with the sharper image swapped in.