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Print size calculator, without the upload.

Find the largest print a picture gives, or the pixels a print needs. Read the size from a file, or type the numbers. Photos, scans and screenshots stay on your device.

  • Free, no sign-up
  • Reads your file
  • Or type the numbers

How to work out a print size

  1. Give it the size

    Choose a picture, or type its width and height in pixels.

  2. Read the table

    See the largest print at each quality, and how the picture sits on each common paper.

  3. Or turn it round

    Pick a paper or type a print size to see how many pixels it needs.

What stays and what doesn't

The picture is only read for its size. Nothing is changed or saved.

When it won't run

Two things stop a run before it writes anything, and each is said on the file's row. A file that cannot be read is reported as damaged, and a picture too large for this device says so, with the limit. In both cases nothing is changed and your original stays as it was. A file in a format the page does not take, such as a GIF, gets a sentence instead of a row.

Working out a print size: what to expect

The quality is a guide, not a standard. Best is what a photo lab asks for, Good suits a fine print on the wall, and Poster still looks sharp when it is seen from a step away. Each one is a number of pixels per inch of print.

A picture rarely has the shape of the paper. The table shows the pixels per inch when the picture fills the sheet, and how much of it is trimmed to do that. A picture that is the same shape as the paper loses nothing.

A file may carry a dpi value. That is only a label. It changes nothing about the pixels, so it does not change the print size this tool works out. Only the width and height in pixels count.

Questions

Are my pictures uploaded?

No. Your pictures are processed inside your browser, on your own phone or computer, and saved straight from this page. The reading at the top of the page counts every byte sent, and it stays at 0 B.

Is the picture sent anywhere?

No. The page reads the width and height of the file and nothing else, on your device.

How many pixels do I need for a good print?

Multiply the width and the height of the print, in inches, by the pixels per inch you want. The calculator does it for any size and lists the common papers, from a small photo to a large poster.

Are DPI and PPI the same?

In practice, yes. PPI counts the pixels of the picture per inch of print. DPI counts the dots a printer lays down, and printers use many dots for each pixel. Here both mean the pixels per inch.

Does the DPI saved in my file matter?

No. It is a label that can be changed without touching the pixels. The width and height in pixels decide how large a print can be.

What if my picture is too small for the print I want?

The pixels per inch fall and the print looks soft up close. Printing smaller, or standing further away, helps. More pixels cannot be made by this tool.

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