A worked example
A 4032 × 3024 landscape photo for a 4 × 6 print: the paper turns to 6 × 4 in, which is 1800 × 1200 pixels at 300 DPI. Fill keeps a 4032 × 2688 strip, and the page says the photo brings about 672 DPI — enough. A 1600 × 1200 photo sent to A4 brings about 137 DPI, and the page says to expect softness.
| Paper | At 150 DPI | At 300 DPI |
|---|---|---|
| 4 × 6 in | 600 × 900 px | 1200 × 1800 px |
| 5 × 7 in | 750 × 1050 px | 1500 × 2100 px |
| 10 × 15 cm | 591 × 886 px | 1181 × 1772 px |
| A4, 21 × 29.7 cm | 1240 × 1754 px | 2480 × 3508 px |
| A3, 29.7 × 42 cm | 1754 × 2480 px | 3508 × 4961 px |
When another page here fits better
For any other paper size, resize image in cm takes any width, height and DPI. If the pixels are already right and only the file's DPI is wrong, change DPI rewrites the tag without touching them.
What stays on your device
The photo is cropped or padded to the paper and saved in this tab. Nothing is uploaded; send the saved file to your printer or print shop yourself.
Bleed and crop marks are not built yet. If a print shop asks for 3 mm bleed, add it to the paper size: 10.6 × 15.6 cm for a 10 × 15 print.
Questions people ask here
Will the print be sharp?
This page does not promise that. It tells you how many of your photo's own pixels land on each printed inch: 300 or more is as much as a photo printer uses, 150 is fine at arm's length, and under 150 the print is mostly interpolated and looks soft up close.
Fill or Pad?
Fill crops the photo to the paper's shape so there is no border; drag to choose what is kept. Pad keeps the whole photo and leaves white strips, which a print shop will not trim off.
Does the file need to say 300 DPI?
Some print software reads it to propose the size. The page offers to write it; it changes no pixel.