Upscale4 Upscale an image

What resolution for a 20 × 30 in print at 300 DPI?

A 20 × 30 in print at 300 DPI needs 6,000 × 9,000 pixels, or 54.0 megapixels. A 12 MP phone photo (4,032 × 3,024) prints at up to 10.08 × 13.44 in at 300 DPI. It needs 4× to cover 20 × 30 in, on Pro and still on your device.

Last updated 2026-10-05

Pixels you need

Pixels
6,000 × 9,000
Print size
20 × 30 in (50.8 × 76.2 cm)
Megapixels
54.0

300 DPI is the photo lab standard for prints you hold in your hand or view at arm's length.

Will your image be big enough?

  • A 12 MP phone photo (4,032 × 3,024) prints at up to 10.08 × 13.44 in at 300 DPI. It needs 4× to cover 20 × 30 in, on Pro and still on your device.
  • A 1024 × 1024 AI image (1,024 × 1,024) prints at up to 3.41 × 3.41 in at 300 DPI. Even 4× with a final resize falls short of 20 × 30 in, so start from a larger source or print at a lower DPI.
  • A 1920 × 1080 screenshot or video frame (1,920 × 1,080) prints at up to 3.6 × 6.4 in at 300 DPI. Even 4× with a final resize falls short of 20 × 30 in, so start from a larger source or print at a lower DPI.

Calculate for your image

Enter your image size. The upscale button updates to the scale you need.

20 × 30 in at other resolutions

DPIPixelsMegapixelsGood for
300 DPI6,000 × 9,00054.0Photos, close viewing
240 DPI4,800 × 7,20034.6Inkjet, wall prints
200 DPI4,000 × 6,00024.0Large prints
150 DPI3,000 × 4,50013.5Posters
100 DPI2,000 × 3,0006.0Banners

How to prepare the file

  1. Crop your image to the 20 × 30 shape so the lab does not cut anything off.
  2. Compare your pixels with 6,000 × 9,000. The calculator above does it for you.
  3. Upscale with the smallest scale that reaches the size, then resize to the exact pixels.
  4. Export PNG, or JPG at quality 95, and order the print at this size.

Questions

How many pixels do I need for a 20 × 30 in print at 300 DPI?

6,000 × 9,000 pixels: 20 × 30 inches multiplied by 300 dots per inch, rounded to whole pixels.

Is 300 DPI good enough for 20 × 30 in?

300 DPI is the photo lab standard for prints you hold in your hand or view at arm's length.

Can a phone photo be printed at 20 × 30 in?

Yes, with 4× upscaling. A 12 MP photo of 4032 × 3024 falls short of 6,000 × 9,000 on its own.

What does DPI mean for a digital file?

Dots per inch is how many image pixels land on each inch of paper. The pixel count is what matters: the DPI field saved in a file does not change the image, the printer scales the pixels to the paper size.

Does upscaling add real detail for printing?

It adds plausible detail: sharper edges and texture instead of the soft blur of ordinary resizing. It cannot recover detail the camera never captured, such as text too small to read.

Neighbouring sizes