Jim's 16:9 HD Screen Size Calculator

Diagonal inches

Used for pixel size:      720p        1080p

RESULTS IN INCHES

Screen width =
Screen height =

4:3 picture diagonal =
4:3 picture width =
sidebar widths =

THE MATH (TRIG FUNCTIONS)
d = diagonal measure
res = resolution, 720 or 1080
a = angle betweeen diagonal and lower edge
h = height of screen
w = width of screen
px = pixel size
alt = diagonal for alternate resolution, same px

tan(a) = y/x = 9/16 = 0.5625
a = tan-1(0.5625) = 29.35775354o

w = d(cos(a))
h = d(sin(a))
px = h / res
alt = (res(px)) / sin(a)