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Image planning & checks

Print Size Calculator

Before ordering a print, check how far your image pixels will stretch. Work from an existing photo, calculate the pixels a new canvas needs, or compare a photo with a specific frame size.

Calculate on your device

JPG, PNG or WebP, up to 25 MiB / 40 megapixels. Read locally; no upload.

Enter valid values to see the calculation. Results update as you type.

Calculations and image inspection run in this browser. Continuing to another tool saves a temporary local copy. No account is needed.

What this helps you do

  • Read real image dimensions without uploading a photo.
  • Use A4, US Letter or 4 × 6 presets, add printer-specified bleed, and carry the calculated pixels into the resizer.

When to use it

  • Check a family photo before ordering a framed print.
  • Prepare a scan or flyer canvas for a print provider who specifies paper dimensions and PPI.

How to use this calculator

  1. Read dimensions from a JPG, PNG or WebP, or enter pixels manually. Choose the calculation you need.
  2. Enter the dimensions and select inches, centimeters or millimeters. Use the resolution requested by your printer.
  3. For a new print canvas, choose a paper preset, enter any requested bleed, then choose fit or fill. With an image selected, Prepare this print copy opens the resizer with those dimensions; preview and download there.

A bigger print spreads the same pixels over more paper

Physical size in inches is pixel dimensions divided by pixels per inch (PPI). Print specifications often call this DPI, although printer ink dots and image pixels are different things. A resolution label by itself does not add image detail.

Use the resolution-check mode when you already know the frame size. If the image and frame have different proportions, fitting keeps the entire photo with blank space; filling covers the frame by cropping. The calculator reports both densities and the area a fill crop would remove.

For a photo held close, 300 PPI is a useful starting point, but follow your print provider’s requirements. Posters viewed from a distance may need less. The calculation cannot assess focus, compression artifacts or printer margins. In pixels-needed mode, a separate bleed control expands the canvas; it does not check whether important content stays inside the trim area.

Formats, privacy and limits

  • Image inspection accepts JPG, PNG and WebP up to 25 MiB, 10,000 pixels per side and 40 megapixels. Calculating a larger canvas is possible, but the resizer cannot apply it.
  • Bleed adds 0–20 mm on every edge. Fill centers the crop; inspect important text and faces. The tool does not create crop marks, set printer margins or write DPI metadata.
  • Files stay in this browser. Continuing stores a temporary local copy; its one-use token expires after 30 minutes. Expired copies are removed on later handoff activity.

Common questions

How many pixels do I need for a 4 × 6 photo?

At 300 PPI, a 4 × 6 inch photo needs 1200 × 1800 pixels. Switch the width and height for a landscape print. Leave any extra bleed requested by your printer outside the final trim size.

Can changing DPI make a blurry photo sharp?

No. Changing the resolution label changes how pixels map to physical size. It cannot recover detail that was out of focus or lost to compression.

Why do fit and fill give different resolutions?

If the ratios differ, fit places the whole image inside the print with empty space. Fill enlarges it enough to cover the print, then crops the overhang. That enlargement lowers the effective PPI.

Put the result to work

Resize your print copy →

Change the file after calculating its destination dimensions.

Check the image ratio →

Find matching dimensions before cropping or resizing.

Arrange images in a PDF →

Prepare a document with page-size and margin controls.