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Daily use 2 min read

How to Resize a Photo in cm or mm for Forms and Print

Forms ask for 3.5 × 4.5 cm, shops print 4 × 6 inch. Here is how to set an exact size without guessing pixels.

Photos are measured in pixels, but forms and print shops use cm, mm or inches. The link between them is DPI (dots per inch).

Quick sizes at 300 DPI

  • 3.5 × 4.5 cm passport photo: 413 × 531 pixels.
  • 2 × 2.5 cm stamp photo: 236 × 295 pixels.
  • 4 × 6 inch print: 1200 × 1800 pixels.

Steps

  1. Open Resize Image in cm and add your photo.
  2. Pick a preset or type the width and height, and choose cm, mm, inch or pixels.
  3. Choose Crop to fill so the face is not stretched.
  4. If the form has a KB limit, type it in the max size box, then download.

Resize Image in cm / mm / inch

Resize in cm now

Try it free

The print size is saved in the file, so a print shop prints it at the right size.

Frequently asked questions

What DPI should I use?

300 DPI for printing. For online forms, only the pixel size and KB limit matter.

Free tools mentioned in this guide

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