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Resize image in cm, mm or inches

Printing and official forms often ask for a size in centimeters or inches instead of pixels. Enter the size and the DPI, and the tool works out the pixels for you.

Drag and drop images here

or

You can also paste images with Ctrl+V.

JPG, PNG, WebP, GIF, BMP. No limit on size or number.

Your images never leave your device.

Options

Resize by

Higher quality gives a sharper picture and a bigger file.

How to use it

  1. Add your photo

    Drag it onto the page or choose it from your device.

  2. Enter the size

    Choose cm, mm or in, then type the width and height. Use 300 DPI for good print quality.

  3. Resize and download

    Press Resize images and download the result.

Good to know about DPI

  • DPI means dots per inch. At 300 DPI, a picture that is 10 cm wide is about 1,181 pixels wide.
  • Use 300 DPI for prints and 72 to 96 DPI for screens.
  • Keep Lock aspect ratio on to avoid stretching. Turn it off and choose Crop to fill if you need an exact shape.
  • On a website only the pixel size matters. DPI matters when a picture is printed.

Frequently asked questions

How many pixels is one inch?

It depends on the DPI. At 300 DPI one inch is 300 pixels. At 96 DPI it is 96 pixels.

Will it print at exactly this size?

The tool sets the pixel size that matches your size at the DPI you choose. Print the picture at its actual size, or at that DPI, to get the size you asked for.

What size is a 4 x 6 inch photo?

At 300 DPI, 4 x 6 inches is 1,200 x 1,800 pixels.