Units of Measurement

It is both interesting and important to note that the screen industry uses the imperial system of measurement and not metric units.

In case you are unfamiliar with using feet and inches, the following conversion rates may be useful.

1 inch = 25.4 millimeters = 0.254 M
12 inches = 1 foot

To convert 100 inches to Metres simply use the conversion ratio:

100 x 0.254 = 2.54M

Example :

We want a screen where the height is 63 inches designed for Video Format.
What should the width be?

Width = 63 / height ratio X width ratio
= 63 / 3 x 4
=84 inches

Example :

We need a 100 inch diagonal screen in HDTV format.

Height = 100 / diag. Ratio X height ratio
=100 / 18.36 x 9
=49 inches

Width = 100 / diag. Ratio X width ratio
=100 / 18.36 x 16
=87 inches

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