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Print Size & DPI Calculator – will my image print sharply?

Enter pixel dimensions and a print size to get the DPI, or find the pixels needed for a crisp 300 DPI print. Common paper sizes included.

I have an image: what DPI will it print at? I want a print size: how many pixels do I need?

Image width (pixels)

Image height (pixels)

Print size

Custom width (in)

Custom height (in)

Target DPI

Print size
Effective DPI
Pixels needed at target DPI
Aspect ratio match

How to use

Pick what you want to find: the DPI an existing image will print at, or the pixels needed for a chosen print size.
Enter the image's pixel dimensions (shown in your photo app or file properties) if you have one.
Choose a standard print size or enter a custom one in inches, and set your target DPI (300 is the usual standard for sharp prints).
Read the verdict, the effective DPI, and whether the image's shape matches the paper or will need cropping.

About this tool

DPI (dots per inch, often used interchangeably with PPI) is simply pixels divided by inches. A 2400 × 3000 pixel image printed at 8 × 10 inches has 300 DPI on both sides. The same file printed at 16 × 20 inches drops to 150 DPI. Photographic prints look crisp at around 300 DPI, acceptable at 200, and visibly soft below 150 when viewed up close; large posters viewed from a distance can get away with less.

The DPI value saved inside an image file does not change the pixels; only the pixel count and the print size matter. If your image's aspect ratio differs from the paper, the print will be cropped or have borders, which this tool flags for you.

FAQ

Is 300 DPI always required?

It is the common standard for prints held in the hand or hung at eye level. For large wall art viewed from a few feet away, 150 to 200 DPI usually looks fine. Below about 100 DPI, pixels start to show.

Can I just change the DPI in my editing software?

Changing the DPI metadata without resampling only changes how big the file claims to print; it does not add detail. Upscaling adds pixels by interpolation, which smooths but cannot recover sharpness that was never captured.

Why does the tool say my aspect ratio does not match?

A 3:2 photo does not fit an 8 × 10 (5:4) sheet exactly. The printer will either crop the long side or leave white borders. Crop the image to the paper's ratio first if you want to control what is lost.

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