CODEWITHSUNDEEP
javascriptimagereact-nativeimage-processing
LayTexas
LayTexas

Reputation: 645

How to calculate an image's DPI?

I have an app that the user needs to upload images, but these images must be at least 300 DPI. I only have the height and width information for this image.

Upvotes: 1

Views: 5656

Answers (1)

Koder
Koder

Reputation: 474

DPI is the measurement of pixel density - it depends on the resolution (with and height you have) and the printed or displayed dimensions of the image. 300x300px image printed on 1"x1" paper will have 300DPI, but if you print it at 10"x10" paper it will have just 30DPI.

To calculate the DPI, divide the resolution by size.

Upvotes: 1

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