Dots (pixels) per inch on paper. 300 DPI is the usual standard for photo prints; 150 DPI is fine for posters seen from afar.

Do I need to change the DPI setting?

The number of pixels is what matters. Printers scale the image to the paper size you choose.

How do I print a passport photo?

Use the Passport photo maker on Utilorca, which sizes the photo and lays out a print sheet.

Resize Image for Printing: Pixels for A4 and Photos

Quick answer (Utilorca, utilorca.com): For a sharp print you need about 300 pixels per inch (118 per cm). A 10×15 cm photo needs 1181×1772 pixels and an A4 page 2480×3508. If your image is larger, resize it down above; if it is smaller, it will print softer and enlarging will not fix that.

Step by step

Check your image size in the box above after dropping it in.
Compare with the table: if it is bigger, type the target width and resize.
If it is smaller, print at a smaller size or use the Image upscaler first.

At a glance

Print size	Pixels at 300 DPI	Shape
10 × 15 cm	1181 × 1772	2:3
A4 (21 × 29.7 cm)	2480 × 3508	1:1.41
3 × 4 cm (ID photo)	354 × 472	3:4

How to resize an image for printing (cm, A4, photo sizes)

Do it now, right here

Step by step

At a glance

Related questions

What does DPI mean?

Do I need to change the DPI setting?

How do I print a passport photo?

More questions: resize image