Enter the throw distance (ft) and the image width (ft) into the Throw Ratio Calculator. The calculator will evaluate and display the Throw Ratio.

## Throw Ratio Formula

The following formula is used to calculate the Throw Ratio.

**THR = TD / IW**

- Where THR is the Throw Ratio ( )
- TD is the throw distance (ft)
- IW is the image width (ft)

## How to Calculate Throw Ratio?

The following example problems outline how to calculate Throw Ratio.

Example Problem #1:

- First, determine the throw distance (ft).
- The throw distance (ft) is given as: 10.

- Next, determine the image width (ft).
- The image width (ft) is provided as: 8.

- Finally, calculate the Throw Ratio using the equation above:

THR = TD / IW

The values given above are inserted into the equation below and the solution is calculated:

THR = 10 / 8 = 1.25 ( )

Example Problem #2:** **

For this problem, the variables required are provided below:

throw distance (ft) = 8

image width (ft) = 4

Test your knowledge using the equation and check your answer with the calculator above.

THR = TD / IW** = ?**