What are the dimensions (width, height, diagonal) of my TV screen or monitor ?

Same calculations for " or cm :

1. 16/9

If D is the diagonal then the width is D x 0.87 and the height is D x 0.49

If A is the width then the diagonal is A x 1.15

If B is the height then the diagonal is B x 2.04

1. 4/3

If D is the diagonal then the width is D x 0.80 and the height is D x 0.60

If A is the width then the diagonal is A x 1.25

If B is the height then the diagonal is B x 1.67

Corrections for cm and " :

If the values are in cm and your want a result in " : multiply by 0.4

If the values are in " and your want a result cm" : multiply by 2.5