Our aspect ratio calculator utilizes the following formulas to help you determine various dimensions of your display:
Aspect Ratio:
aspect ratio = width : height (reduced to lowest terms)
Diagonal Length in Pixels:
diagonal = √(width^2 + height^2)
PPI (Pixels per Inch):
PPI = diagonal in pixels / diagonal in inches
PPI (Pixels per Inch):
PPI = √(Pixel Width^2 + Pixel Height^2) / Diagonal Length
PPI^2 (Pixels per Square Inch):
PPI = √(Pixel Width^2 + Pixel Height^2) / Diagonal Length
or
PPI^2 = PPI × PPI
PPcm^2 (Pixels per Square Centimeter):
PPcm^2 = PPcm × PPcm