Exertis Almo Calculators

Exertis Almo's in-house system design experts have you covered with tools to deliver impeccable visual and sound experiences. Whether you're working with a screen, flat panel, or LED wall, or even designing a sound system, the tools below will help you answer questions such as: How big does an image need to be? Where should the viewers be located in relation to that image? Will my sound reinforcement system be free from feedback?

Using the calculator is as easy. 1. Select a calculator from the tabs below. 2. Fill in the fields with the measurements/data. 3. Results will be automatically calculated and displayed in the gold fields.

For commentary and diagrams, click on the help icons.

Display Sizing and Viewer Distances | Basic Decision Making (BDM)

Enter Farthest Viewer Distance.

- OR -

Enter Image Diagonal Size.

Enter Aspect Ratio.

Enter %Element Height (%EH) Default is 3%.

Enter Distance from Floor to Top of Image.

Enter Eye Height.

Enter Ambient Light Measured at Screen Location.

Enter Desired Contrast Ratio.


Image Size (in Inches).

Image Area (in Square Feet).

Farthest Viewer.

Closest Viewer.

Minimum Element Height.

Projector Lumens Needed.

Viewer Distances and Pixel Pitch | Analytical Decision Making (ADM)

The ANSI/AVIXA V202 standard as well as other resources use an Acuity Factor of 3438 for ADM. This is the ability to resolve every element (pixel) of a displayed image. The AVIXA standard for ADM defines the FV, meaning that anyone closer than the FV distance can resolve pixel level detail. This would also be the same as the CV distance for dVLED pixel pitch.

Enter Diagonal.

Enter Resolution.

Enter Aspect Ratio.


Farthest Viewer.

Pixel Pitch (in mm).

Pixel Pitch (in inches).

Potential Acoustic Gain (PAG) | Needed Acoustic Gain (NAG)

This calculator uses distances to compare the Potential Acoustic Gain (PAG) of your sound system with the Needed Acoustic Gain (NAG) of your system. Enter the Distances and if the Result is 0 or Greater, the System will be Considered Stable.

Enter Distance from Loudspeaker to Microphone.

Enter Distance from Loudspeaker to Listener.

Enter Distance from Microphone to Source.

Enter Equivalent Acoustic Distance.

Enter Number of Open Microphones.

Enter Feedback Stability Margin ("6" is the default value).