How Many Pixels Is 30×40 at 300 DPI?
30×40 inches at 300 DPI is 9000×12000 pixels. Here are the exact dimensions at every DPI, the ratio 30×40 belongs to, and how to prep the file.
- 30×40 inches at 300 DPI is 9000×12000 pixels.
- At 200 DPI it's 6000×8000; at 150 DPI it's 4500×6000.
- 30×40 is a 3:4 ratio, shared with 6×8, 9×12, 12×16, 18×24.
- Fewer pixels than the 300 DPI figure will print soft, whatever the DPI tag says.
30×40 inches at 300 DPI is 9000×12000 pixels. That's the resolution your image needs to print sharp at 30×40. With fewer pixels than that, the print looks soft — the DPI tag alone doesn't add detail.
30×40 in pixels at 300, 200 and 150 DPI
| DPI | Pixels for 30×40 in | Use |
|---|---|---|
| 300 | 9000×12000 | Print standard — sharp at any distance |
| 200 | 6000×8000 | Acceptable for larger prints |
| 150 | 4500×6000 | Only OK for big art viewed from a distance |
For a large piece viewed from a few feet away, 150–200 DPI can look fine, so the 200 DPI figure is a safe floor.
What ratio is 30×40?
30×40 is a 3:4 ratio. It shares that shape with 6×8, 9×12, 12×16, 18×24, so one 3:4 file prints them all. That matters because a print only fits a frame when the shapes match.
Will a 30×40 file fit the frame?
Only if the frame is the same 3:4 shape. Put a 30×40 file into a frame of a different ratio and you get borders or a cropped image. To cover every frame your buyers own, offer one file per ratio (2:3, 3:4, 4:5, 5:7, 11:14, ISO A).
Make a 30×40 file from one image
Drop your art into the free Ratio-Pack Generator and it outputs a correctly-cropped 3:4 master at true 300 DPI — right for 30×40 and every same-shape size. Not sure your image is big enough? Check it with the free DPI Checker or convert any dimensions with the pixels-to-inches calculator.
Ratio-Pack Generator
Turn one image into every print ratio buyers ask for — 300 DPI, cropped in your browser. Free, instant, nothing uploads.