Image File Print Size Checker

Select a photo or image from your device and this tool reads its actual pixel dimensions locally to show the largest sharp print sizes at common DPI values. Nothing is uploaded. If you only know the pixel numbers and want a manual table, use How Big Can I Print?

How it works

The image is read entirely in your browser: width ÷ DPI gives the physical print width. A 6000 × 4000 px image prints at 20 × 13.3 in at 300 DPI, 30 × 20 in at 200 DPI, and 40 × 26.7 in at 150 DPI. Larger prints are possible at lower DPI but will look soft up close.

When to use this checker

• Before ordering a print, canvas or poster, to confirm the photo is large enough.
• When a client or customer asks whether a specific image can be printed at a given size.
• To compare several photos and choose the one with the most pixels.
• For print-on-demand sellers checking files before uploading a listing.

Worked examples

• 6000 × 4000 px (24 MP): 20 × 13.3 in at 300 DPI, 30 × 20 in at 200 DPI, 40 × 26.7 in at 150 DPI.
• 3024 × 4032 px (12 MP phone photo): about 10.1 × 13.4 in at 300 DPI, or 20.2 × 26.9 in at 150 DPI.
• 1200 × 1800 px: exactly 4 × 6 in at 300 DPI - a classic photo print with no room to spare.
• 4000 × 4000 px square: 13.3 × 13.3 in at 300 DPI; a 1:1 canvas of that size is achievable.

What the tool reads - and what it ignores

The checker reads the real pixel dimensions stored in the image and ignores the DPI metadata, because the metadata does not change the amount of detail. It also reports the file size on disk, which is useful information but not a quality measure: a heavily compressed JPEG can be small in megabytes while still containing plenty of pixels, and a large PNG can contain relatively few.

Why the result can differ from your gallery app

Some photo apps display a downscaled preview and report the preview's dimensions rather than the original file. If the number here is larger than what another app shows, trust the file itself - this tool loads the original image data in your browser without uploading it anywhere.

Common mistakes

• Trusting a file name such as "highres" instead of checking the actual pixels.
• Forgetting that cropping the image afterwards reduces the available print size.
• Assuming 300 DPI is required for every product - canvas and posters are often fine at 150–200 DPI.
• Uploading a screenshot instead of the original photo, which drastically reduces resolution.

Related tools

How big can I print? · Print PPI calculator · Prepare images for print