Pixels you need
- Pixels
- 2,700 × 3,600
- Print size
- 18 × 24 in (45.7 × 61 cm)
- Megapixels
- 9.7
150 DPI is the usual floor for posters viewed from one to two metres away.
Will your image be big enough?
- A 12 MP phone photo (4,032 × 3,024) prints at up to 20.16 × 26.88 in at 150 DPI: enough for 18 × 24 in without upscaling.
- A 1024 × 1024 AI image (1,024 × 1,024) prints at up to 6.83 × 6.83 in at 150 DPI. It needs 4× to cover 18 × 24 in, on Pro and still on your device.
- A 1920 × 1080 screenshot or video frame (1,920 × 1,080) prints at up to 7.2 × 12.8 in at 150 DPI. It needs 4× to cover 18 × 24 in, on Pro and still on your device.
Calculate for your image
Enter your image size. The upscale button updates to the scale you need.
18 × 24 in at other resolutions
How to prepare the file
- Crop your image to the 18 × 24 shape so the lab does not cut anything off.
- Compare your pixels with 2,700 × 3,600. The calculator above does it for you.
- Upscale with the smallest scale that reaches the size, then resize to the exact pixels.
- Export PNG, or JPG at quality 95, and order the print at this size.
Questions
How many pixels do I need for an 18 × 24 in print at 150 DPI?
2,700 × 3,600 pixels: 18 × 24 inches multiplied by 150 dots per inch, rounded to whole pixels.
Is 150 DPI good enough for 18 × 24 in?
150 DPI is the usual floor for posters viewed from one to two metres away.
Can a phone photo be printed at 18 × 24 in?
Yes. A 12 MP photo of 4032 × 3024 already has more than 2,700 × 3,600 pixels once cropped to the print shape.
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.