Pixel converter
Pixels2480
Inches8.27
Centimeters21
Millimeters210

2480 px / 300 DPI = 8.27 in. Multiply inches by 2.54 for centimeters.

Common page sizes at 300 DPI, the print quality Flipsnack exports
PageInchesMillimetersPixels at 300 DPI
A48.27 x 11.69210 x 2972480 x 3508
A55.83 x 8.27148 x 2101748 x 2480
US Letter8.5 x 11216 x 2792550 x 3300
US Legal8.5 x 14216 x 3562550 x 4200
Square8 x 8203 x 2032400 x 2400