Free tool
How big can you print this photo? Pixels, DPI and print sizes in one table
Free print size calculator: turn pixels into centimetres and inches at 300, 240 or 150 DPI and see which print sizes a photo can fill, 10 × 15 to 60 × 90.
Facts and prices checked on 2026-11-06.
Type the pixel size of a photo, or read it from the file, and pick a print resolution. You get the print size in centimetres and inches, and a table of common print sizes showing the pixels each one needs and the resolution your photo would actually reach.
50.8 × 33.9 cm · 20 × 13.3 in
at 300 DPI · 24 megapixels
| Pixels needed at 300 DPI | Your photo | |
|---|---|---|
| 10 × 15 cm · 4 × 6 in | 1181 × 1772 | 1016 DPI |
| 13 × 18 cm · 5 × 7 in | 1535 × 2126 | 781 DPI |
| 20 × 25 cm · 8 × 10 in | 2362 × 2953 | 508 DPI |
| 20 × 30 cm · 8 × 12 in | 2362 × 3543 | 508 DPI |
| 21 × 29.7 cm (A4) | 2480 × 3508 | 483 DPI |
| 30 × 40 cm | 3543 × 4724 | 338 DPI |
| 30 × 45 cm · 12 × 18 in | 3543 × 5315 | 338 DPI |
| 29.7 × 42 cm (A3) | 3508 × 4961 | 342 DPI |
| 40 × 60 cm | 4724 × 7087 | 254 DPI |
| 50 × 70 cm | 5906 × 8268 | 203 DPI |
| 60 × 90 cm | 7087 × 10630 | 169 DPI |
Which DPI to aim for
- 300 DPI: the usual target for prints seen at hand distance, such as albums and small frames.
- 240 DPI: enough for most lab prints; the difference from 300 is hard to see.
- 150 DPI and below: large prints and posters seen from a few steps away.
These are common rules of thumb, not limits: viewing distance matters more than the number. A print lab asks for a pixel size, which is why the table shows pixels needed for each format. If a size falls short, crop less or choose a smaller print rather than enlarging the file, which adds no detail.
DPI and PPI
Strictly, pixels per inch (PPI) describes the file and dots per inch (DPI) the printer, but labs and software use DPI for both. The DPI value stored in a JPG changes nothing on its own: only the pixel count and the print size do.
Give clients full-resolution files they can print anywhere, from one Galerly gallery.
See client galleriesFrequently asked questions
How many pixels do I need for a 20 × 30 cm print?
About 2362 × 3543 pixels at 300 DPI, or 1890 × 2835 at 240 DPI. Any photo from a current camera or phone is enough.
Does changing the DPI in an editor make the print bigger?
Only the label changes, unless the editor also resamples the pixels. The detail available stays the same.
Is the photo uploaded when I read its size?
No. The browser reads the dimensions locally and nothing is sent.
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