Display PPI (Pixels Per Inch) Calculator

Enter the number of pixels (e.g. horizontal 640, vertical 480) and the diagonal viewing area dimensions.

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PPI:
Dot Pitch (mm):
book cover image for Princess Ramona, Beloved of Beasts
link to iBookstore for Princess Ramona, Beloved of Beasts
Ruth Gilmore Ingulsrud’s Princess Ramona, Beloved of Beasts, a new children’s ebook with beautiful, Retina iPad-optimized illustrations by Swedish artist Therese Larsson and read-aloud narration by the author, now available on the iBookstore.