Image Resizer by Inches
Resize a picture to an exact size in inches for printing.
Image Resizer by Centimeters
Resize a picture to an exact size in centimeters for printing.
Drop your files here
or
Choose filesAccepts JPG, PNG and WebP · up to 25 MB · up to 20 files
Processing locally…
Privacy. This tool works entirely inside your browser. Your file is never sent to us, never saved, and never seen by anyone else. Read how we handle files
Printers work in centimetres; screens work in pixels. DPI is the bridge between them — the number of dots the printer puts in each inch.
Enter the printed size you want and the DPI you are printing at, and the tool works out the pixel dimensions. The arithmetic is: centimetres divided by 2.54 gives inches, multiplied by DPI gives pixels. A 3.5 cm width at 300 DPI is 413 pixels.
300 DPI is the normal choice for photographs and anything that will be looked at closely. 150 DPI is enough for a draft or something viewed from a distance. 600 DPI suits documents with small text.
Bear in mind that asking for a large print at a high DPI needs an enormous number of pixels, and the source photograph has to contain them. A 2 megapixel phone photo cannot fill an A4 sheet at 600 DPI with real detail, however you resize it.
How to use it
- Choose your files, or drag them onto the box above.
- Enter the width and height you need, then press resize.
- Download the result. Nothing is kept once you leave the page.
Files it accepts
- JPG
- PNG
- WebP
- Up to 25 MB per file
- Up to 20 files at once
Questions
What DPI should I choose?
300 for photographs, 600 for documents with small print, 150 for a rough draft. Higher DPI means a larger pixel size and a larger file.
How do I convert cm to pixels myself?
Divide the centimetres by 2.54 to get inches, then multiply by the DPI. 3.5 cm at 300 DPI is 3.5 / 2.54 x 300, which is 413 pixels.
It says the size is too large for a browser.
You have asked for more pixels than a browser can hold in one image. Lower the DPI or the printed size and try again.
Is this tool free?
Yes. Every tool here is free, and you do not need an account, an email address or a phone number.
Is my file uploaded to your server?
No. This tool runs inside your own browser, so the file never leaves your phone or computer. Once the page has loaded you can even switch off your internet connection and the tool will still work.
Which files can I use?
This tool accepts JPG, PNG and WebP. The largest file it will take is 25 MB.