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Resize Image in CM

Size an image in centimetres, millimetres or inches for print.

Image Tools Reviews Free · no sign-up

Drop an image here, or click to choose one

JPEG, PNG, WebP, GIF or SVG · processed on your device, never uploaded

Quick Tool Overview

Resize Image in CM bridges screen pixels and printed size. Type the dimensions you want on paper in centimetres, millimetres or inches, choose a DPI, and the tool works out the pixel size and resizes to match. It also warns when your original does not carry enough resolution for that print at that density — the check that saves a wasted trip to the printer.

What it does
Resizes an image to a physical print size
You give it
An image, a size in cm, mm or inches, and a DPI
You get back
The resized file plus its pixel dimensions
Best for
Printing photos, posters and documents
Image Tools Free, unlimited use No sign-up Runs in your browser

About the Resize Image in CM

Screens think in pixels and printers think in physical size, and the bridge between them is DPI. A 4 by 6 inch print at 300 DPI needs 1200 by 1800 pixels; the same print at 72 DPI needs only 288 by 432 and will look like a photocopy.

Type the size you want on paper, pick the unit and the DPI, and the pixel dimensions are calculated and the image resized to match. The tool also tells you whether your original has enough resolution for that print at that density — the warning that saves you finding out at the print shop. Common paper sizes from A6 up to A3, plus the standard photo sizes, are one click away.

Key features of the Resize Image in CM

Centimetres, millimetres or inches

Work in whatever unit the print job is quoted in, with the conversion handled for you.

DPI aware

300 for photographic printing, 150 for documents, 72 for screen — the pixel target changes with the density you choose.

Resolution warning

If the original cannot support the requested print at the chosen DPI, you are told before you download rather than after you print.

Paper size presets

A6 through A3, plus 4x6, 5x7 and 8x10, load their dimensions with one click.

Both numbers shown

The physical size and the pixel size are displayed together, so the relationship between them stays visible.

How to use the Resize Image in CM

  1. 1

    Add the image

    Drop in the file you intend to print. Its pixel size and current print size are shown.

  2. 2

    Enter the physical size

    Type a width and height in centimetres, millimetres or inches, or pick a paper preset.

  3. 3

    Choose the DPI

    300 for photographic printing, 150 for everyday documents, 72 only for screen use.

  4. 4

    Check the warning and download

    If the original lacks the resolution the tool says so before you commit.

Frequently asked questions

Use 300 DPI for photographs and anything held close to the eye. 150 DPI is fine for documents and posters seen from a distance. 72 DPI is a screen convention and produces visibly soft prints.

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