Convert Image to 300 DPI
Set any JPG or PNG to 300 DPI without resizing it or losing quality. The DPI is already chosen, so just add your images.
300 DPI · Step 1 of 3 · Add your photo
Drop images to set 300 DPI
or paste with Ctrl+V · JPG PNG WebP HEIC GIF · max 25 MB
Processed on this device. Nothing is uploaded.
DPI Converter
Set a common DPI
Example
Before and after
We ran this sample through the 300 dpi tool above. The numbers under each image are measured from the real files.
How to
How to convert an image to 300 DPI
- 1.
Add your images. One file or a whole batch.
- 2.
Keep 300 DPI. It is already set. The print size updates in the settings so you can check it.
- 3.
Download. Same pixels, new DPI. Download one by one or as a ZIP.
Why this size
300 DPI, the print standard
Print shops, photo labs and most document forms treat 300 DPI as the standard for sharp prints. At 300 DPI, a 4 x 6 inch print needs 1200 x 1800 pixels and a 3.5 x 4.5 cm passport photo needs 413 x 531 pixels.
If your photo has enough pixels, setting it to 300 DPI makes it print at the size you expect instead of a giant 72 DPI poster.
| DPI | Prints at | In cm |
|---|---|---|
| 72 DPI | 16.7 x 25.0 in | 42.3 x 63.5 cm |
| 150 DPI | 8.0 x 12.0 in | 20.3 x 30.5 cm |
| 200 DPI | 6.0 x 9.0 in | 15.2 x 22.9 cm |
| 300 DPI | 4.0 x 6.0 in | 10.2 x 15.2 cm |
| 600 DPI | 2.0 x 3.0 in | 5.1 x 7.6 cm |
Avoid
Common problems and fixes
- The photo prints too small at 300 DPIAt 300 DPI each inch needs 300 pixels. A 600 pixel wide photo prints 2 inches wide; start from a larger original for a bigger print.
- The portal still rejects the photoCheck the pixel size and KB range too. DPI is usually one rule among several.
FAQ
300 DPI: questions
Checked
How we checked this page
Checked by the SizePort team on .
We test the tool with sample photos before it goes live and check that the sizes on this page match what it produces. Rules and platforms change, so if something here is out of date, tell us and we will correct it.
How the tool works
The tool changes only the DPI value stored in the file header. The pixels, the colors and the image data stay exactly as they were, so nothing is re-compressed. Everything happens in your browser; your images are never uploaded.