Free Image DPI Calculator
Work out an image's print resolution (DPI), or figure out what pixel dimensions you need for a target print size — nothing is uploaded, it's all calculated in your browser. Want to check what's already embedded? Try the Image Metadata Viewer.
No file selected.
Result
- Resulting DPI
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- Print quality
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Pixels needed for common targets
How to calculate image DPI
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1
Enter pixel dimensions
Type them in directly, or load an image to auto-fill them.
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2
Enter the intended print size
Set the width, height, and unit (inches or centimeters).
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3
Click "Calculate"
See the resulting DPI and pixel targets for common print sizes.
Example use cases
Checking if a photo will print sharp
See whether an image has enough resolution for the print size you want.
Figuring out what resolution to shoot or scan at
Work backward from a target print size to the pixel dimensions you need.
Preparing files for a print shop
Confirm an image meets a print vendor's minimum DPI requirement.
Frequently asked questions
What is DPI?
Dots per inch - a measure of how many pixels are packed into each inch of a printed image. Higher DPI generally means sharper detail at a given print size.
What DPI should I aim for?
300 DPI is the standard for high-quality print; 150 DPI is acceptable for large-format prints viewed from a distance, like posters; anything under 150 DPI tends to look pixelated up close.
Does DPI affect an image shown on screen?
No - screens display images at their pixel dimensions regardless of the DPI value stored in the file. DPI only matters for print.
Is my image uploaded to a server?
No - if you load an image to auto-fill its pixel dimensions, that happens entirely in your browser. The calculation itself uses only the numbers you enter.