Projector Calculator

Find the projected image size from throw ratio and distance.

Image width 2.667

Image diagonal (16:9) 120.46

Formula: width = distance / throw ratio

Step-by-step with your numbers:

1. Values used:

2. Throw ratio = 1.5

3. Throw distance = 4

5. Image width = Throw distance / Throw ratio = 4 / 1.5 = 2.667

6. Image diagonal (16:9) = 120.46

Did we solve your problem today?

A projector's throw ratio links the distance to the screen with the image width.

The math behind it

image width = distance / throw ratio. For 16:9, the diagonal is width x sqrt(1 + (9/16)^2).

Throw 1.5 at 4 m gives a 2.67 m wide image (about 121-inch diagonal).

What is throw ratio?

Distance to screen divided by image width - lower means a wider image up close.