DPI check — how large the print will stay sharp
A free DPI check for printing: upload an image and see straight away how large in centimetres it will print sharply, at 300 and at 150 DPI, and whether that’s enough for a chest logo, an A4 sheet or the whole front of a t-shirt. The file isn’t uploaded anywhere. We only read its size in pixels.
- Free, no registration
- Your file isn’t uploaded anywhere
- Works in the browser, on phone and computer
- The result is ready to print
The file isn’t uploaded. We only read its size in pixels.
What DPI is and why the DPI check matters
DPI (dots per inch) is how many pixels of the image fall on one inch (2.54 cm) of the print. The bigger the print, the more pixels it needs to stay sharp. The same picture can be perfect as a small logo and blurry when stretched across the whole back.
| DPI at the size you want | Result |
|---|---|
| 300 or more | excellent, a sharp print |
| 150–300 | acceptable, may look slightly soft up close |
| under 150 | blurry or pixelated |
These are the same thresholds the DTF builder uses to check every uploaded file.
How many pixels common sizes need
| Print size | For 300 DPI | For 150 DPI |
|---|---|---|
| Chest logo, 10 cm | about 1180 px | about 590 px |
| A4 sheet, 21 cm | about 2480 px | about 1240 px |
| Full front, 28 cm | about 3310 px | about 1650 px |
The calculation is simple: centimetres ÷ 2.54 × DPI. The tool above does it for you.
If the image is too small
- Look for the original file. Photos sent through chat apps or downloaded from social media are usually downsized.
- For a logo, ask for a vector file (SVG, PDF, AI or EPS). It stays sharp at any size.
- Reduce the print size to the one the tool shows for 300 DPI.
Not sure? Send us the file and we’ll tell you whether it works. We also help prepare files.
Frequently asked questions
What DPI do I need to print a t-shirt?
About 300 DPI at the actual print size for the best result. Below 150 DPI the print comes out blurry.
Can I increase the DPI by changing the setting in Photoshop?
No. Changing the DPI without adding pixels doesn’t make the picture sharper. What matters is the size in pixels.
Is my file uploaded?
No. The tool only reads the size in pixels, locally in your browser.
Does DPI matter for a vector file?
No. Vector files (SVG, PDF, AI, EPS) are sharp at any size.
Is your file ready?
Put it on a t-shirt, hoodie or mug in the online designer and see the price straight away.