How can I calculate the throw distance on a projector?

Calculating the projector’s throw distance is fairly easy and can be worked out through the below equation:

Width of screen x Lens throw ratio = Throw distance

The throw ratio can be found in the Specifications section of the projector’s product page.

For example:

The VPL-FHZ75 has a throw ratio of 1.39:1 to 2.23:1.

If your desired screen width is 100” (2.54m),

100” (2.54m) x 1.39 to 2.23 = Throw distance of 139” to 223” (3.53m - 5.66m)

This means that the VPL-PHZ75 can be mounted at any distance between 139” and 223” (3.53m to 5.66m) to make a 100” (2.54m) screen size.

To make things easy, you can also download our Projection Simulator.