300 DPI is the number every printer asks for, and the one most files miss. The catch is that typing 300 into a DPI box doesn't fix anything. What matters is how many pixels you have at the size you're printing.
- Target
- 300 DPI at print size
- Formula
- Inches × 300 = pixels
- File
- PNG or PDF
- Background
- Transparent
DPI is really about pixels
DPI means dots per inch. For DTF, it tells you how many pixels land in every inch of the print. A file that's 3,300 pixels wide prints sharp at 11 inches, because 3,300 ÷ 300 = 11. Print that same file at 15 inches and it drops to 220 DPI, which shows up as soft edges.
How to check your file's real DPI
Divide the pixel width by the print width in inches.
| File width | Print width | Real DPI | Result |
|---|---|---|---|
| 3,300 px | 11″ | 300 | Sharp |
| 3,300 px | 15″ | 220 | Soft edges |
| 1,200 px | 11″ | 109 | Blurry |
| 1,050 px | 3.5″ | 300 | Sharp left chest |
In Photoshop, go to Image > Image Size, uncheck Resample, and type your print width. The resolution box shows your real DPI at that size.
Why online DPI converters don't fix blurry art
Most DPI converters only change a number stored in the file. The pixels stay the same, so the print looks the same. If your file is too small for the size you want, you have three real options.
- Find the original. Go back to the source file, or ask your designer for the full-size export or vector file.
- Rebuild it as vector. Logos and text redrawn in Illustrator scale to any size with no quality loss.
- Upscale with care. AI upscalers can help with photos and illustrations. Zoom to 100% after upscaling and check edges and text before you upload.
Set it up right from the start
- Start your canvas at the final print size and 300 DPI.
- Build logos and text as vector when you can.
- Don't screenshot, copy from a website, or save art from social media. Those files are almost always 72 DPI.
- Export as PNG with a transparent background.
Sizes by placement are on our DTF transfer size chart.
FAQ
What DPI do DTF transfers need?
300 DPI at the final print size.
Can I just change 72 DPI to 300 DPI?
Only if you shrink the print size at the same time. Changing the number alone doesn't add detail.
Is 150 DPI good enough?
It's noticeably softer up close. Stick to 300 for anything you're selling.
Files at 300 DPI?
Check the rest of our artwork specs and upload.