Instructions: Type in the three known values above, then click the "calculate" button below. You must have "0.0" entered in the box that you want the system to calculate. You must also select the radio button next to the description of the value you would like to be calculated for you. No negative values please. Use only the digits 0 thru 9 and "." as your decimal character.

Note: In the equations above, "Projection Diag. Size" refers to the distance between opposing corners of your resulting projection on the wall or projection screen. "Distance" refers to the distance between the front of your projector and the wall or projection surface. "LCD Diag. Size" is the distance between opposing corners of your LCD panel (the image area only). "FL" is the focal length of your projection lens (the focal length of your fresnel lens is not a factor here).

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